using Universal Clipboard to copy and paste between my Apple devices STOPS intermittently - this page doesn't fix it https://support.apple.com/en-us/102430 -

I have a Mac Mini on 14.4 (23E214), an iphone SE on 17.6.1 and an ipad pro on on 17.6.1. I use imessage on the mac to send to android users (have SMS & MMS on) and it works for weeks then stops... I have wasted many days stoppong and rebooting and setting up pre online and youtibe instructions - then I realsied that in fact it's because the 3 devices suddnely won't work together - I can no longer drag my curser between the mac screen and the imac and I can't copy/paste between the mac and the iphone for instance. All support on this is either way out of date or doesn't fix the problem. THIS HAPPENS every now and then.. weeks go by and it won't work I fuss about for days then forget about it and then it's working again. All checks made - same wifi network, bluetooth on all settings correct etc. MY question is HOW does this happen when there are no changes occurring? As well, of course how to fix it efficiently and how to stop it happening!! On Youtube I see that many people have this problem, thank you for any help