then it should not be called "mining". it implies figuratively hard work and in practical terms that is difficult calculations.
if it can be achieved on cheap hardware it begs the question if it really is "crypto". crypto is another word with implied meaning. you do not do crypto on a mobile device. if the thing you do is easy to calculate it ain't crypto. (not talking about actual cryptography here, but the buzz word crypto)
that fba has nothing to do with blockchains nor crypto. it is a means of reaching agreement with a subset of authorities in a scenario where some of those authorities are not reachable or could be lying. you can use it to decentralize authorative decisions: like, has that payment be made or not.
but just because you use some fba algorithm does not create worth. you could try to manage existing worth with it. let us call it a coin for lack of a better word. but who has coins to begin with? who has authority to mint new coins? or authority to "mint" new nodes? in olden and the new days that was and is the ruling goverment. in the crypto world that is done by hard work of extra difficult mining, so you can prove you did it. and not just claim you did it and spam the system with more generals to make your fake coins legit.
the existing crypto "currencies" are parasites. they only have worth because someone bought them with real money and there is a lingering promise that the coins can be traded back for real money. and that promise was broken often enough. buying real goods is usually not really possible. the currency is too volatile and the cost of authorizing a transaction is too costly, even with all that optimisation. you do not pay for a 5 dollar game if paying for that game costs additional 5 dollar in transaction energy costs distributed to a large network of nodes. (or 500 dollars in case of bitcoin).
you need to have a primal mover. an inherent worth. for gold it was the rulers that liked jewelery (and now the computer industry) and the fact that gold is hard to literally mine. for money it is the promise of a government to accept it for paying your taxes.
the primal mover for "crypto currency" was once that decentralized money thing. but this evaporated for lack of real life application. it now is only the pyramid scam promise. and this insanity can go on for decades.
summary: who mints new coins, how could you transfer real money into the system, who creates new nodes. in "crypto", this is done by caluclations that prove you put did hard work. if your system does this by magic and majority agreements, it is not crypto, even if you use a blockchain to store your agreements. you sure you even need the blockchain for your system... ;-)