You’re entitled to your Social Security benefits regardless of where you reside globally. You don’t have Medicare coverage outside of the US though.

Typically, your Social Security is your passive/pension/monthly income that qualifies you for a long term retirement visa.

A hack you can do if you can work remotely is collect Social Security out of the country while working remote; this increases your income and if your annual income replaces previous lower income years on your Social Security wage record, your monthly benefit will go up over time as the SSA re-evaluates your benefit annually (not to mention cost of living adjustments).