from the article
"...there is also no evidence suggesting that Russia, Belarus, or Lithuania are Pegasus customers. Latvia appears to use Pegasus, but the country is also not known for targeting victims outside of its borders. ...., Estonia does appear to use Pegasus extensively outside their borders, including within multiple European countries. "
It would be very surprising to see Russia using Western tech such as Pegasus, you can't just outsource your spy tools to your enemies. They most likely have as powerful if not more technologies.
This whole NSO spectacle is more about the subversive BDS movement than a genuine care about political suppression and spying on the citizens.