Dante63, thanks for your help and comments earlier.I will make 1 more version of the SMH...
Wait a little bit longer, if that version works, it will solve most of people problems with the latest version...
My head is spinning - I haven't done stuff like this since the days of Windows Mobile!
Could you just tell me whether, as I now have 184.108.40.206 on the watch, with ECG and BP in the update, although not available to my Huawei P20 Pro, should I still install the apks?
Or do I understand that the next SHM you modify might just work with the 220.127.116.11 and the P20 as-is?
Really sorry, and grateful for any help.
(The watch is from UAE, but I'm in the UK)