I have a 10.5” iPad Pro running 13.5.1 and a 2009 iMac running High Sierra. Both devices can see each other in Bluetooth but the iPad doesn’t show up in the Airdrop window and and the same on the iPad. I’ve reset the BlueTooth module, reset PRAM and ensured that do not disturb is turned off. Any idea what to try next. I’ve obviously shut down the iMac and the iPad at least once.