Simo429 - that is a really good question and I am not claiming to ‘know’ the answer but I have a view.
In Hunter Allen’s book ‘Training and Racing with a Power Meter’ he includes tables of different Cats with watts/kg for sprint, 1m, 5m, 20m etc. so there is some data out there if you are interested. It was also designed to help riders understand their strengths.
That said, I have trained with power for a few years and only came to bikes maybe 5 years ago in my late 30s. I started TTs last year, did a few Cat 3/4 races and have raced a bit in the track. I’m a Cat 3 and now focus more on the road races or just bunch rides (some of which are a bit like race simulations).
My suggestion would be (if you’re not already) get involved in some bunch rides with a club, clubs or local bunch rides that involve multiple clubs. APRs can be good because it has a sense of halfway house about it - folk are compelled to work together and bunches are smaller). If you find you can mix it with the ‘scratch groups’ then have a go at a road race.
The thing with road races are so much of it about riding efficiently, position in the bunch, cooperating (or not) with others, being out of the wind or making efforts when it matters. For these reasons although FTP is important it is only part of the story…I learned a lot from riding with experienced folk who just did not waste as much energy as I do! Still a lot to learn…