One trick I use with Pulse stacks to have control over font sizes, and font types is drop them into a “Styler Stack” - I use Joe Workman’s “Letterpress Box Stack” a lot for this, (and the “Freestack R Styler” stack), then you can control the H2 (or whatever) from there. There are a ton of font Styler Stacks out there (including instacks “CustomFont” stack) which should work as well