HK requirement is very hard so check well what they classify for Thailand. 21 days is the time you have to had spent in a country they deem not high risk to be allowed to do Test&Go.
Ask hotel to update 2nd result for Morchana. I was never able to use the link. Not that anyone checked my Morchana anyways but I got it green but they kept sending update requests ;)
look around 150 you can find Wave or Click with some effort. I didn't rent any this time so don't have any direct leads but would just call one of those that deliver to you. Or ask some business use their connection. Worst short rental time is 200 per day unless I missed inflation. I saw that list prices of bikes gone up some so it is brewing.