Is there a public tool to develop on dev servers?

Similar to how development happens at big tech companies like Meta, Google, etc.?

You mean something like repl.it? Or GitHub Codespaces? Or AWS Cloud9? You can find many virtual dev environments, most with a free tier.

For a few dollars a month you can run an instance of your own at Digital Ocean, AWS, Google Cloud, etc. Some cloud providers have free tiers as well.

This is actually really helpful thank you! I suppose my question was a google search that I couldn't get quite right.