If your homelab local only - well all of these are unnecessary if you’re the only one who uses it. If you want to expose homelab to internet - you can pretty much use VPN to connect to your homelab without needing to expose whole homelab. Just a port to connect to VPN.

Do not over complicate things

There’s not much reasons of exposing any of your local services to internet. Use vpn to have access to your local resources. This is best you can come up with for your home lab

For now yes. iOS on the way, will upload tomorrow

Can you install standalone android apps on Roku?

Just music