Hey @4321534413,
While Cross Progression is being introduced this season, it is rolling out in waves so not everyone may see it immediately.
You should see a splash screen similar to the one below confirming your account has been migrated once this takes place.
In this case, since you've connected a PC account to the EA account that already had all your Xbox progress, you don't need to do anything else!
Once Cross Progression is activated for that EA account, you'll be able to use that content on any connected platform.
The October 26th date just indicates no content would be merged from accounts created after that point, you'll still be able to take part in Cross Progression.