I installed forgejo on my home server and never looked back. The only problem I face is when hosting an app on DigitalOcean App platform, or vercel etc. They only connect to GitHub.
They also support deployments from GitLab (so long as you're using the gitlab.com-hosted instance and not a self-hosted GitLab instance). If you've deployed your own self-hosted forge, then you can connect DigitalOcean App Platform to it by using gitlab.com as a bridge—register an account on gitlab.com once and instruct your self-hosted forge to replicate copies to gitlab.com. You don't really need to actually use GitLab.
Having said that, considering that DigitalOcean is in the business of selling IaaS/PaaS, it's loony that they don't let you connect to, say, your own self-hosted Forgejo running on their infrastructure…
(Indeed, considering how many people would like to self-host their own forge but how few people want to actually set up and do admin for it, it's loony that DigitalOcean doesn't pick up, say, Forgejo and/or an alternative and offer a sharply discounted (e.g. $20/year) quasi-managed one-click deployment option with first-class support for connecting to their App Platform.)
For things that require GitHub I’ve been able to mirror repos there and get things working. Keeping code in sync is annoying though.
Money to be made. And they have (had) nice API for most development needs. The actual distribution is a arduous though, mostly around the Review process.