Let’s face it, most frameless packs are stuff sacks with shoulder straps. I’ve used a few over the years, and realized that trying to add features to imitate a framed backpack was mostly a futile effort to make the pack work like one with a frame. So I always would remove hip belts and found exterior mesh pockets and the like — just flimsy attachments that fail over the short term.
I used a zPacks Zero for many years. It did have two water bottle pockets for desert hiking and a pad holder. Nothing else.




So they are going to hang off you shoulders. Yes, you can build a quasi-frame with a “burrito” foam pad or a foam pad is a sleeve in the back of the pack, but with much weight at all, you’ll end up with most of the weight on the shoulders.
With frameless packs, the hip belt is mostly just to secure it to the waist — to keep it from moving too much.
Many here will disagree with me, but attempting to make a frameless pack work like a pack with a real frame is an exercise in futility.