I have a 1.4 yeti 4wd 2016, 130000 miles, it has a continuous rumble which increases with speed , sounds like a wheel bearing and it is also present while coasting.

I do a bit of DIY but i wouldnt tackle complex stuff, Ive just jacked car up on each wheel and couldnt find any play or noise when turning by hand.

If it not the wheel bearings where would the next area be to look please?

First thing is get the wheels off the ground and check if it is the wheel bearings bearings.

Your description points to a wheel bearing which is worn. They can start to make a droning noise linked to road speed before they are worn enough to feel play or roughness when testing by hand with the wheel off the ground. The drag from the transmission on a 4 x 4 will make it hard to spin the wheel and feel for roughness. Sometimes the noise is louder when cornering, due to side thrust and changing load, but I had a rear bearing go and it didn't show this behaviour so its not an infallible test.

You might be able to find a good diagnostic workshop who can put the car on a rolling road with a vibration sensor attached to each suspension assembly in turn, to pinpoint which bearing has failed. Alternatively you could carry on using the car until the noise has got loud enough to identify the culprit, it will gradually get louder as it wears more.

I no longer work on "heavy" stuff like suspension and wheels, as I don't have impact drivers or the space to swing a long breaker bar.

If all the wheel bearings are smooth and no play (as said they can still make noise but feel ok) It might be the centre bearing in rear propshaft thats failing or propshaft coupling. Had one go on an old volvo 940 and made a droning sound varying with speed.

Alasdair