Actually, there are two types of tax sales in certain US states. Both have some sort of redemption period (3 years or so) for owner of property and mortgage holder, which provides them the opportunity to come up with the money and pay the debt, court fees, etc. to reclaim the property.
At a tax sale, typically a Certificate is provided, that can be turned into a deed, at the end of the redemption period.
Therefore, yes original owner, if they can come up with money, could claim the lot back with house on it, within redemption period.
Now original owner would have to pay reasonable expenses of current owner that purchased certificate at tax sale, and perhaps compensate developer for reasonable improvements or prove otherwise.
So in this situation this is a very costly process of recovery for original owner, and with the lottery amounts attorneys make, could easily eat up value of asset or not?
And perhaps if current owner prevails, they get their attorney fees paid by developer and get to keep house too?
What a can of crap to sort out! This is why US is lawfare country, where BS claims can be made against an innocent person, and that person has to have deep pockets to defend themselves or they get KO'd