The way I’ve solved this for myself is by disabling those features using the Windows Registry. I derived the keys below from brave://policy and Google’s policy documentation:
[HKEY_LOCAL_MACHINE\Software\Policies\BraveSoftware\Brave]
"BraveWalletDisabled"=dword:00000001
"BraveVPNDisabled"=dword:00000001
"BraveRewardsDisabled"=dword:00000001
"PasswordManagerEnabled"=dword:00000000
"BraveAIChatEnabled"=dword:00000000
"IPFSEnabled"=dword:00000000
"TorDisabled"=dword:00000001
Modifying the registry directly is probably not the best way to do this, but I haven’t encountered any issues during my time with these settings activated. Moreover, the Brave stuff completely disappears from menus this way, so I prefer this over toggling the same keys in brave://flags.
Hope this is of any help to you!