There is no limit in-game for how long you can play in-game during the Early Access beta period and the game will update to the ‘full’ version( The ‘How can I access the full retail version of Football Manager from the Early Access Beta version’ FAQ) when the game is released on the 8th November 2022.
If you still unsure about any of the above information, please submit a support request, and a member of our team will try to help.