I have been using Microsoft Edge and it’s surprisingly good, the management of Personal - Work account and the integration with SharePoint and Microsoft 365 for my work it’s really handy.
I know there is a unofficial flatpak Unofficial-Edge-Flatpak
And actually this has been mention by the Microsoft Edge Dev as a way to play XCloud games in SteamDeck XCloud Games in SteamDeck
Maybe a snap package would be great for Microsoft Edge?