[Honey]

as others have already suggested, Its nothing to worry about its just bots trying to bruteforce your password, you could install tools to restrict login attempts or make a sudo account and disable login to root entirely if thats an option(not sure tbh, just an idea).

anyways, I recommend using this site, https://haveibeenpwned.com/

If you subscribe to it It always lets you know if your email pops up in a breach anywhere so that you can change your passwords.