I also just had the same issue. Completed a full 23 race season, then completed a second 10 race season. No trophies for either championship.
I managed to get mine to pop, eventually, but had to use a friend's PS5 for it to work. I did about 10 seasons on my console and nothing popped but, using my friends PS5, they popped at the first attempt :/
That is terrible. I have now done two seasons, started a separate career and have been awarded the trophy but still no pop. It's strange, when these trophies didn't pop, I also did not receive the 20 fastest lap trophy when I should have. After I finished the season, I closed and reopened the game and then the trophy popped during practice 1 in the very next session.
This game is a total mess. On top of that I've been snaked out of the elite trophy as well. I've gotten the platinum on every F1 game since since 2015. If this isn't fixed, this will definitely be the last F1 game I buy.
