Keep applying. Those companies are probably garbage to work for anyway if they can’t figure out how to communicate with someone who has a stutter.
Many remote companies do a lot of their communication through text. Basecamp is a very popular company that does all their communication asynchronously. I’m sure the odds of getting in there as a Junior dev is very low, but it can’t hurt to reach out. You may even succeed at angering DHH (owner of Basecamp and creator of Ruby on Rails) enough that he’ll hire you out of spite lol I wouldn’t put it past him.
There are so many options for teams to successfully communicate with you. Relying more on text, text to speech, and (can’t believe I’m saying this) patience. I know shocking right?
There are companies out there that would be accommodating to you, you just haven’t found them yet.
It may be helpful to be upfront about your stammer in your application and maybe explain some of the strategies that you use to overcome this. It could just be a total shock for the caller if they’re going in cold and just didn’t expect to here you’re stammer.
I really hope you’re able to find that job!