I use Aliucord which by default removes many of the associated Discord trackers.
It should be noted that all 3rd party apps are against Discord TOS. No one has ever been banned for these clients as far as I know, but it is possible that they could start banning in the future.
When they ban thats when I will use there app as a web app inside Hermit..but for now I prefer Vendetta over aliucord which is far more updated and has themes and plugins support
You can try all you like, but the reality is that as long as you're logged into their service (which you'd need to be to use it), they will track you in ways that you can't shield yourself from.
If you want to try:
Set up an account and use the service through a VPN.
Register using email/names/information that is not linked to your actual personal info.
Use a DNS adblocker, or something like Adguard on Android to block any app-side trackers.
Opt out of whatever you can through Discord (not that I think they abide by it, but all you can do is try).
That's when I hit "DELETE ACCOUNT" because there isn't a single service I can't live without, and these companies keep pushing their luck.
I remember when I closed a Roblox account, which i only created to play with my son years ago, and they wanted my DRIVER'S LICENSE. I told them quite firmly that if I was able to create an account without one, they sure as hell arent getting it now. They deleted the account. LOL
Just keep in mind, Brave is run by a for profit company, and privacy is only profitable if your customers are paying for that privacy. The fact that Brave is free for users means that their stated goals are antithetical to their business interests. You cannot trust Brave to respect your privacy.