Can't help but notice that this is all deep red states. Why might that be? From above, this seems pretty bipartisan and what Lina Khan (MVP) has been working on for the last four years.
State AGs from the same party are more likely to work together on a suit. Big tech has almost exclusively donated to and supported democrats over the years, so AGs from that party have more political capital to lose.
Over time the sentiment towards concentration of power in small number of big tech firms has rubbed both the Democrats and Republicans the wrong way.
Somewhat for different reasons initially, but the end result/agreement converges.