Since you don’t need a US work visa to practise from India, some EAs work remotely for US firms or CPAs. Time zones matter, so expect some late or early hours in busy season. And US firms will check your PTIN and your standing with the IRS.
In the US
You can also move to the US and work there. But the EA doesn’t give you a work visa. You’d need your own visa route, which depends on your employer and immigration rules. Treat those as two separate things.
In other countries
Some people ask about the UK, Canada, Singapore or the Gulf. The EA isn’t a local licence there, so it won’t let you do local tax work. But firms in those countries sometimes need people who understand US tax, especially for American citizens living abroad.In that situation the EA can make your CV look better, but what you earn and the job you get will depend on the firm and on how much experience you’ve got overall.
Planning to settle in another country for good? Then find out which local qualification employers there look for. The EA could still help you, but it probably won’t be the main thing they ask about.