When employers/customers have raised the location/timezone objection — which would happen after they decided they want to hire me — I tell them let’s try it and see if it’s a real problem. I commit to responding to emails (or Slack) within 12 hours, making myself available at any time with some advance notice, and giving them a phone number I will answer 24/7 in case of emergency. No one has ever fired me or canceled a contract because I was in Greece or Vietnam.
In sales lingo this is called overcoming objections. You overcome objections one at a time, as the customer/employer raises them. You should have a plan to overcome the likely objections. You don’t filter yourself out from the beginning. Simply getting interviewed and hired is the biggest thing to get past.
I’m not a loner oddball. I participate in and even manage teams and projects, do system admin and maintain infrastructure, and write code, all remotely. Several of my nomadic friends had full-time jobs somewhere and just went traveling and continued doing their jobs, no one even asked where they were.