You're crazily fixated on f-35s. Its only one way of many to get gps coordinates to HIMARS. Others are satellite intel, drones, counterbattery radars, targets can be geolocated using pictures, old fashioned way with people on the ground using maps, etc.
Are there F-35s there? Of course, those are Uke AWACS, etc. I found something you warmongers should really get a rise out of. Enjoy, your dreams come true. We save Ukraine from the Russians!