They do, they want to see licence payments

But it's not only that. The first operators looking for an upgrade including AESA were the RoKAF, ROCAF and the USAF. Korea initially selected the BAE offering with Raytheon's RACR, but Taiwan and the USAF went with LM's upgrade with NG's APG-83. Subsequently the RoKAF cancelled the contract with BAE and selected the now defacto standard LM upgrade with the APG-83 radar instead (aka the F-16V Viper) .
All of these 3 programs were upgrades to existing F-16s, so the new radar had to fit into older airframes. LM then offered this package for their latest new build version aswell, which is the F-16C/D Block 70/72.
Surely LM would offer a newer version of the F-16E/F Block 60, if anyone wants to pay for it, but so far, customers prefer the safer and cheaper option.