You can't exactly prevent them from trying to enter your email and clicking "forgot password", but there are a few things you can do to make sure you're still secure.
Use two factor authentication on your Google account. Google has an authenticator app that is used to link to your Gmail. This is more secure than using your phone number as a two factor ...
AFAIK there is no way to block certain locations (countries, regions, continents) to be used to recover a Google Account password.
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Avoid getting locked out of your Google Account
It is almost impossible to you to recover your account as you have deleted your account 2 years back.
There is some grace period (around 1 or 2 weeks) within that users can recover their account, but in your case it's impossible, still you can try steps provided on Google Account Help page.
If it doesn't help, you can consider creating a replacement Google ...