ADA Compliance, Heading order for Icon Boxes and Zooming Slider

We are working on ADA compliance, WCAG 2.1 for our website. Part of that effort requires headings be in order, such as H1 then H2 then H3. Skips are a non-compliance, such as H1 then H3. Icon box titles utilize H3 headings, and the titles of Zooming Slider Items utilize H6. These often cause non-compliance as these headings are out of order with the rest of the page. Is there a way to change these heading levels or edit them? It is likely other elements are affected as well, but icon boxes and zooming sliders are the two I have discovered at this time.

For future improvements, it would be nice to be able to edit the heading level of these items and/or format them as standard text but adjust font size based on %.

Thank you!

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