How can I convert excess H2 titles to H3 on my homepage?

Store Design
1

My website is checked for SEO optimalization. Now it says that there are too many H2 titles on my homepage. It should be maximum of 8 and I have 21 H2 titles. How can I change some sections on the homepage to H3 titles?

2

@longlady Send me your store url.

3

That is:

https://www.longlady.nl