Agree avoid this scammer. Last time the telegram thread turned into a total mess, builds would be teased but never happen, the guy was compiling on his phone allegedly at one point. Doesn't test his own builds, kicked off official programme, asks for beta testers then begs for money.
Also... As people have stated, not a developer just someone that's somehow managed to clone a repo and get it to build. Be warned, you'll flash it, have issues and they won't get fixed.
You want PE there's plenty of other ROMs offering that. Treskmod is popular, not on Android 10 build yet...but 10 is kinda overrated anyway lol