Look into mumble. It’s NOT a discord replacement but does provide a good quality, low latency, OSS voice chat. Mumble + Signal group chat is what my friends and I use for gaming. Seems to work well.
Tip: Turn on text-to-speech to get narrated announcements when users join channels. Also works for text chat shenanigans. 🤣
A last-gen refurbished pixel + GrapheneOS has been my go-to for years now. Gives me all the polished featured of flagship hardware with regular security updates and privacy.
Bonus points, the google play compatibility shim means you can run 99% of apps that are on the play store.
Just test the refurbished phone thoroughly on the stock os in case you need to swap it out.
You are correct, a VPN connection does not bridge to another profile. You can install a VPN in said work profile. The always-on VPN settings in grapheneos have the work icon to indicate what VPN is in your work profile.
Glances over at my 1954 GE Combination that has NEVER been serviced outside of cleaning and replacing the light bulbs.