Clutch change / gearbox

I have been waiting on a shortlist supposedly for clutch but heard nothing, I think they are overbooked with work at AKS and to be fair I should really have been chasing, but I hardly use my car so not really been a priority - been isolating as my wife has been under treatment for cancer anyway.

Having successfully (touch wood!) sorted a clutch on wifes citigo, being a give it a go kind was wondering has anyone tried on Octavia 5e (2.0 TSI) manual 6 gear to sort the clutch?

Its over standard power and I find that its starting to slip at demanding higher power/ foot down.

I can drive reasonably normally for now, for the most part this is fine as the UK is becoming a giant speed camera pothole anyway but could be useful if ever wanting to serve a dual purpose of visits to pod / track where power can be more unleashed with mostly less consquence, again touch wood.

Might also be useful time to review the differential / or reports of weak 4th gear shaft support? I gather people use something like this. I think I'm not brave enough for that kind of work though and would seek assistance from an engineering company.
https://www.darksidedevelopments.co.uk/products/02m-02q-gearbox-4th-gear-input-shaft-support.html
That said some interesting videos on youtube do reveal some of the secrets behind it - like https://www.youtube.com/watch?v=ldr4wyHQ5g0

For the clutch might be a job similar to this though its for a Seat ? https://www.youtube.com/watch?v=W6MkMAQeOJ4