Recovering from a hacked account is so painful when we accidently get scammed.
To recover hacked gmail, do it as fast as possible. Even if a hacker changes your phone recovery and or your email recovery, Google still keeps your previous recovery data for some time (maybe 7 days). I called it the grace period.
In my case, i successfully recovered my gmail less than 12 hours after the account was hacked. After successfully signing in into your account, go to https://myaccount.google.com, immediately check your devices, and sign off of any unknown device.
Then, in security, check recovery options. Remove any unwanted recovery option. Add your original recovery phone number and recovery email if necessary. Verify them as soon as possible.
These processes are race conditions with hackers.
If a hacker changes your email account for Mobile Legends: Bang Bang and email account Clash of Clans, you will lose them. No one of those games provides good support for recovery.