Lost all my Microsoft account games on the microsoft store

You should be able to reinstall games that you have purchased. Be sure that you are signed in with the correct microsoft account on your PC and console companion.

there should be no problem with your account since doing a complete reset does not mean that the games are deleted from your account

I believe you have not lost, check your account correctly, because everything that is purchased in the account belongs to it, enter the main account (from which the games were purchased) If you continue, contact support.

Double check that email address, because it does sound like you have signed in with a different account.

Also, check the purchase history on the account here:

https://account.microsoft.com/billing/orders/

You can also check your devices list that these have been installed on here:

https://account.microsoft.com/devices/

If both are empty, it's got to be the wrong account.

By any chance did you get these with a MS Live gold subscription and has that subscription expired? If you get games that are available to live gold and it expires you lose access to those games.