HI johnkagi - yes what I wanted to do was the other way around. I have since managed to get around this by very carefully on my Desktop writing down my long password (20 characters which were mixed up with upper and lower case plus special ones) then going to my phone having removed and reinstalled the Kagi App on the phone, clicking log in and then manually typing in the full password. This has correctly connected.
What was confusing me is that I was used to my browser remembering all my earlier searches. I had forgotten the Kagi is privacy friendly and therefore doesn't log every key stroke and search.