Check out Nicaragua, getting a dirt cheap property there seems to give you PR, then visiting once a year only can lead to a passport in 2 years.
NOT sure of all those details, just seen people talking about it!
Also some states will probably run into serious problems with liquidity this year, so there might be an opening that is affordable somewhere...
Did not the Comoros option collapse?
Hear that their agent in Dubai went rogue, that they then tried to revoke passports︀ sold by them, but got enough pushback to let those that had bought one keep︁ it.
IF its still up & running interesting for sure!