Seems like a pretty clear PT-MFP coalition?
They will need 375 seats out of 500 for that which they will clearly not get since the 250 pro-military senators get to vote for PM as well.
To be viable the new government must have 375 lower house MPs OR 250 lower MPs plus the support of the 250 senators.
A grand coalition of PT and various pro-military parties (BJT, PPP UTN) is the most likely outcome. BJT's leader and current DPM Anutin Charnvirakul seems to have a good path to become PM.
That's disappointing, so the best thing for democracy would have been if PT actually got way more votes. I guess it is what it is. Maybe this reduces the chance that another Shinawatra has to go in exile.