Join the HPG Discord server - then see the H145 discussion. The H145 is not the same as the H135, especially when it comes to functionality added to the tablet. For instance, if you want AutoPilot functionality or don’t want to have to use your rudder pedals to counteract torque in straight-ahead flight, the options for those are currently on the main control panels, not on the tablet. The main developer interacts a lot with users in the Discord forum but I think the reason for the tablet difference is, as pointed out by AndyDigital, is the H145 is early access and the developer just didn’t want to smack dab copy H135 features into the H145 but rather carefully rework all aspects of what’s been done so far - that takes time and a lot of diligence. Both the H145 and the H135 have an external camera that looks down the H135 does not. That’s made all the difference to me in landing where I want and avoiding things that will cause a crash when descending.
Edit_Update: See my following post below. My Bad. H135 in version 1.4.1 also has an External Camera 4 that looks down in the Showcase camera views. I just failed to scroll past the first 3 camera views offered to notice it.