They had a linux version way back. I do not think it will ever come back. Not in Sweden at least. Either Google will pressure the cartel of banks which develops the eID app to use the dumb Google Play attestation API which prevents it from working even on more open android versions like GrapheneOS, or they will simply find it too convenient to start using that API. Then it's finished. There is no demand from anyone, as you cannot even run it on any non-Google sanctioned device. There is no competition, but just a cartel of all the biggest banks which develops the single eID app (there is one alternative which works in very few places). It is not looking good.