I am to guess that the wiring "jumper" connections are working?
I mean, just out of safety as well as to find blown traces, has the coupling caps in between the stages - have they been checked?
I'm not asking for values unless you have a meter appropriate for that, but more like preventing these new finals from getting destroyed from any caps that failed as dead shorts from the excessive problem of blown finals the first time - was there any "welded" dead-short caps?
There are lots of SMD caps on the back side of the board, are they still holding up ok?
Or, are they sucking out the RF the Finals generate before it goes out to the antenna?
You have an RF probe, so run your attenuator (at least 10X down) and scope those same points because the RF side seems to be low to very low - you should be seeing about 40 volts Peak to Peak at C417 or even C460 - those SMD ones located in the Pi filter network, so the Predriver (2) may have to be checked out too.
The Predriver(s) are Bipolar and they squeeze a lot of stuff for bias underneath those RF shields on the foil side.
It would not be a bad idea to rework - reflow some solder in those area to see if it will "wake up"
The Driver uses an EN369 DR suffix. But it appears to be working - just not a lot of signal from further upstream from those Predrivers and Mixer section.