Bilstein B6 shock absorbers tend to be fitted for more controlled and firmer damping.
If the OP just wants new front shock absorbers without replacing the rear shock absorbers, I suggest he takes a look at the standard Bilstein B4, KYB, or Sachs options. These will hopefully closely match the standard rear shock absorbers that he already has on the car.
If the OP has the 19" wheels on a front wheel drive Karoq, ie. 225/40R19 on 8J rims then changing to smaller diameter rims such as 16" or 17" would make a big difference to ride comfort.
As the car is on a PCP contract, he will probably be limited to the standard Skoda tyre and rim choices, ie. 215/60R16 6Jx16 ET43 and 215/55R17 7Jx17 ET45.
17" might provide the best compromise between handling and comfort, but see details of the 215/60R16 fitted to a relatively wide 7J option near the end of this post because 16" rims might turn out to be the best option. For much cheaper rims you could consider 6.5Jx17 ET38 steel rims from the Kodiaq with the 215/55R17 tyre size. However, this is non-standard on the Karoq but the outside edges of the 6.5J ET38 rims would have exactly the same position in the wheelarch as the 7J ET45 rims, so it would take an expert to realise they weren't standard Karoq rims. Perhaps get the much cheaper option and change back to the original wheels when it's time to hand the car back. As a benefit, the slightly narrower 6.5J rims will slightly improve the ride comfort further compared to the 7J rims.
Ratikon 7Jx17 ET45 5/112 57.1 alloy rims (215/55R17) (from Karoq)
https://eshop.skoda-auto.cz/cs_CZ/alu-kola/c/alloyWheels?q=%3ApriceAsc%3AcarType%3AKaroq%2B%282017%2B%29%3ArimDiameter%3A17%22%3ArimDiameter%3A16%22&text=#
6.5Jx17 ET38 5/112 57.1 steel rim (215/55R17) (from Kodiaq)
https://www.autodoc.co.uk/alcar/14750807?search=ALCAR+Rim+(9021)
https://www.mytyres.co.uk/rims/details?vehicleId=639488607098246256&rimCode=ALCAR9021
Wheel trims for 6.5Jx17 ET38 5/112 57.1 steel rims (from Kodiaq)
https://eshop.skoda-auto.cz/cs_CZ/sada-poklic-borneo-17/p/565071457++Z31
One further non-standard 17" option is the non-standard 225/50R17 tyre size fitted to the standard 7Jx17 ET45 rim size. You might choose this option because you like the look of the wider tyre size, and/or it better protects the 7J rim, and/or it's a cheaper tyre size, and/or you can only get the tyre you want in the 225/50R17 tyre size (eg. Vredestein Quatrac 6 comes in 225/50R17, but not 215/55R17).
As you can see in the chart below, 225/50R17 has an outside diameter 1.1% smaller than the standard 16" tyre size on the Karoq front wheel drive. Up to 1.5% difference between standard and non-standard tyre sizes is generally considered to be only a small difference.
Outside diameter of tyre
215/60R16 664.4mm
225/50R17 656.8mm (1.1% smaller compared to 215/60R16)
Some 16" options
If you want more comfort than 17" provides, then 16" is the way to go. As well as the standard 215/60R16 6Jx16 ET43 option, there's also non-standard options such as 215/60R16 6.5Jx16 ET43, and 215/60R16 7Jx16 ET45, etc. 215/60R16 fitted to a 7J rim width is going to be a particularly sporty option and really does raise the question of whether you need 17" rims in preference to 16" rims. After all, 16" has a number of advantages over 17". 215/60R16 can be cheaper than 215/55R17. 16" rims can be considerably lighter than 17". For example, the 6J and 6.5J steel rims below weigh less than 8kg each. By comparison, each 6.5Jx17 ET38 steel rim weighs about 3kg to 4kg more. Multiple that by 4 (or 5 including a spare)...and that's a lot of extra weight.
Out of the below three rim widths, ie. 6J, 6.5J, 7J, the middle 6.5J could be a good compromise between the two extremes. The Superb MK3 also fits it's standard 215/60R16 tyre size to a 6.5J rim...albeit ET41 (but then it's a different car). The Yeti fitted its 215/60R16 to a surprisingly wide 7J rim.
Alcar 6665 6Jx16 ET43 5/112 57.1 steel rim
https://www.autodoc.co.uk/alcar/14750540
Alcar 9187 6.5Jx16 ET43 5/112 57.1 steel rim
https://www.autodoc.co.uk/alcar/14750834
Alcar 9257 7Jx16 ET45 5/112 57.1 steel rim
https://www.autodoc.co.uk/alcar/14750851
As you can see in the ETRTO (European Tyre and Rim Technical Organisation) chart below, a 215/60R16 tyre can be fitted to a rim width between 6.0" and 7.5", with 6.5" in bold because that's the standard rim width for this tyre size.
Notice that the 215/55R17 can also be fitted to a rim width between 6.0" and 7.5", but the standard rim width for this tyre size is 7.0".
ETRTO approved rim width for passenger car tyres
215/60R16 6.0-6.5-7.5
215/55R17 6.0-7.0-7.5
215/50R18 6.0-7.0-7.5
225/40R19 7.5-8.0-9.0