Heading size and header spacing you can actually change
Two settings in Video Social, Video Minimal and FAQ Pills were being overridden by the stylesheet on smaller screens. Mobile heading size now responds, and there is a new control for the gap between the header and the content below it.
Merchant-reported, and worth explaining because the shape of the bug is a useful one to know about.
The heading that would not change size
In Video Social and Video Minimal, the Heading size slider goes from 26px to 72px. On a phone it did nothing at all. Every value produced the same result, around 35px, because the stylesheet was setting its own fixed size below 480px rather than reading yours.
There is now a separate Heading size (mobile) control, so phones and desktop can each get a size that suits them. The desktop slider keeps working from tablet width up, exactly as before.
If you had been fighting this one, you were right, it was not you.
A gap you could not adjust
The space between the header and the content underneath it was baked in: 40px in the video sections, 44px in FAQ Pills. Some layouts want it tighter, some want room to breathe, and there was no way to ask.
Space below header is a new setting in all three sections. Set it to 0 to pull the content right up under the heading, or open it up to 96px. It scales down on smaller screens on its own, so you set it once and it stays sensible on a phone.
FAQ Pills had the same problem waiting one layer deeper, with a second fixed value for mobile that would have quietly cancelled the setting out. Both are fixed.
Getting it
Open Sections, find any of the three, and choose Update to latest. Your existing settings and content are kept. If you had never touched these sections, everything looks exactly as it did, with two more controls available.