The technical specifications published online foresee publication of the app also on alternative android stores, but Linux phone users are missing out. Though I guess things could always be extended...

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summm 4 days ago | parent [-]

Their security model requires remote attestation. So, open, user-controlled platforms cannot be used. Of course some other future locked-down linux-based OS might be usable.

	▲	subscribed 3 days ago \| parent [-]
		Remote attestation in theory includes all aosp-compliant attestation implementations (in practice that's GrapheneOS already), but the current project plans and implementation openly reject it.