Hello from a fellow reverse sloper!
Most Audiologist start off with similar process. They will not automatically give you a 100% gain (think of gain as the volume boost). The brain has to get used to regaining the hearing. They will gradually bring up the gain over several visits. I never had a problem with the gain on the lower frequency sounds, but the high pitch sounds were almost painfully piercing at first. Had to have them tweak those frequencies several times to get them comfortable. I have seen others with reverse slope post similar experiences with the higher frequencies, so be prepared.
Most of us with lower frequency losses need power domes, or even custom ear molds, to get the most benefit from the hearing aids. The lower frequency sounds can cause more feedback problems when you have open style domes. The closed domes and custom molds trap the amplified sounds in the ear canal better and eliminate the feedback. But, it also causes a stuffy feeling, called Occlusion, that many people can not stand.
My Hearing Aid Tech experimented with multiple domes over several visits, he tried Closed and Open styles. He even changed receivers a couple of times. I did not have a problem with the Occlusion that many experience, but I did have a lot of the feedback with the open domes. So I currently have Power Domes with High Gain Receivers. I have almost no feedback. I can force it to happen if I intentionally cup my hands over my ears. But the Whistlestop kicks in and stops it quickly. For me it is a good fit, but you may have a different experience with the feedback and the Occlusion. Just be willing to keep trying changes until you find a fit that is good for you.
My Tech setup my Bluetooth and Remote on the first visit. But I can see where they would not want to overwhelm a new user with too many new things. I am a Computer Geek by profession. So for me the Remote and Bluetooth Device were not any problem to assimilate and use. If they had not given them to me, I most likely would have figured out how to set them up without him! If you really want them on the first visit, ask for them. You are paying for them, so you should be able to use them!
I Googled the Phonak Ambra microP’s just before clicking the submit button. Looks like those are hearing aids that use tubes instead of receivers located in the Ear. So my comment about the Power Receiver would not match your hearing aids. But you will still need a dome or mold on the end of the tube. So that will still apply.
Good Luck and post your questions here and someone will try and help you.