If you are able to include a trailer (main limitation I have found is does not go on a train easily), that solves the weight and balance issue for the bike, as you can offload as much weight as necessary.
You gain lots of space, which makes touring much more relaxed. I put bulky but lightweight items such as sleeping bags and spare clothes in panniers, the rest in the trailer.
Then your choice of bike can be less restricted: a rack battery is less weight than all your gear or shopping in a pair of 20l panniers, and so probably manageable.
You might get on OK with a high torque mid-drive from Bosch, Shimano or Yamaha as they give much higher multiplication of rider input than the Fazua. You would be looking at Bosch PerformanceLine or even the CX, Shimano E6100 or even EP8. I don't know the Yamaha range.
All of those would answer your hill climbing and load lugging needs - worst case is changing to a bigger cassette for lower bottom gear. BUT after the Fazua, you would have to verify by adequate test riding that they can do the job.
You can do a quick test, which is put the bike in lowest gear and highest assist, and just ride away. My 60+ year old legs, otherwise in good order, do that without noticing any effort. But that is what you can only know yourself, by trying out various bikes.
If torque sensor is an absolute no, then the simple choice is the chunkiest cadence sensored rear hub motor you can find and a good sized battery. That will do most things, but extreme hills or touring weight will be its limiting factor. Plenty of folk on here can flesh out that spec, and provide reassurance (or warning!) about capabilities.
Otherwise what's left is cadence sensored mid-drive, where I have to plead lack of experience.