The new baofengs like the UV-21Pro V2 are locked out from being able to transmit on or above 480mhz.
Basic problem is likely found in the band limits tab in Chirp. If the band limits are too narrow the xmit frequency may be automatically inhibited. When the software flubs up it has been seen to set the band limits to 25 kHz from lower to upper limit. This is a clear no-go on repeaters and won’t transmit the out of band limit frequency. It limited my unit to 144.075 to 144.100 but allowed the programming of repeaters at 147 MHz just fine. They just were not permitted to transmit on the “out of limits” but in ham band frequencies.
Hope this helped!
Do your R-CTCS and your T-CTCS thats what worked for me and if you program via your computer the baofeng program will auto fill the T-CTCS with the same Hz as the R-CTCS
In the uk we dont have anything above 480 so that’s a perfect place for a band limit anyway