Gamerscore

I'm afraid that there is no way to reset a legitimate gamerscore at all. Gamerscore resets are only given to people who illegitimately modify their gamerscore. When they get their gamerscore reset, however, there are a number
of other consequences:

1) All of the gamerscore will be reset to zero.

2) A person with a gamerscore reset will be permanently branded "Cheater" on your gamertag.

3) All lost gamerscore and achievement are gone forever, and irretrievable.

No.

The only way gamerscore is ever removed is if the enforcement team finds that you cheated or modded your gamerscore and they issue a gamerscore reset. Other than that, there is no way to have your gamerscore removed.

Last enforcement was in 2019 and it wasnt for gamerscore so will this mean i will be able to earn gamerscore still or get the gamerscore back?

No. The only way to have any gamerscore removed is if the enforcement team determines you have modded your gamerscore and they issue a gamerscore reset.

A Gamerscore correction occurs on a player’s Xbox Live account when they gain achievements through the use of external tools and avoiding gameplay. Xbox Live is committed to keeping the service free of this type of behavior as it violates the Microsoft Services
Agreement and Code of Conduct. When abnormal achievement or Gamerscore activity is found, Xbox Live modifies the Gamerscore of players who meet specific criteria

When a Gamerscore correction occurs the player’s Gamerscore is reset and previously-earned achievements remain unobtainable.

Gamerscore cheating will result in a reset of the account’s Gamerscore, and depending on the circumstances and severity of the violation may be accompanied by a temporary or permanent account suspension. Under certain circumstances, a Gamerscore correction
may be limited to achievements earned on a particular platform. Egregious or repeated Gamerscore violations may lead to a device ban.