Apple Watch SE 2ND GENERATION

Hello!! I have purchased my first Apple Watch SE2nd generation - paired fine with my XS MAX just a few weeks ago. Everything looks fine, except not getting email notifications ( I have 3 accounts) or YouTube or Facebook notifications. Calls and messenger or Viber or what's up works ok, I have tried everything from resetting and all that you can imagine..watching tutorials etc. Nothing.. Some times I get mails with a delay... Any one with the same issue?