AFAIK, Microsoft is disabling manifest V2 extensions in Edge following the same timeline as Chrome[1]. Brave is continuing to run V2 extensions, but has no plan to stand up their own extension store[2], so it isn't clear how users will get the extensions, beyond a few handpicked ones that Brave is supporting[3].

[1] https://learn.microsoft.com/en-us/microsoft-edge/extensions-...

[2] https://github.com/brave/brave-browser/issues/15187

[3] https://github.com/brave/brave-browser/issues/28367