Has something happened to my AirDrop?

[PaBear]

I have a number of Mac devices in daily use - a 2021 MBPro M1 with Monterey 12.3.1; a 2022 I-pad Mini6, IOS15.4; I-phoneXR, IOS 15.4.1 and other older items including an iMac from 2011, running macOS High Sierra 10.13.6. In the same household there is a MacBook Air, an i-phone 7 and a 2020 I-pad. Pretty much all the time each can 'see' the others and each shows 'Discoverable' .
All are set to use Bluetooth, AirDrop and are on the same single wi-fi hub. None, however can use AirDrop. In turn each will say that pairing between devices is not possible.
Has someone stolen AirDrop?

 

[PaBear]

I should add that the remote feature, phone & IPad, in
Keynote, doesn’t work either.