Adding an H1 tag to your website pages is considered a best practice because it helps search engines, including Google, quickly understand the main focus of a page. However, adding an H1 tag to your homepage can be challenging due to the differences in website themes.
Here are few tutorials for adding H1 tags to different themes:
General tutorial: https://tiny-img.com/blog/h1-heading-shopify/
Dawn theme: https://youtu.be/O_TjBkoiSUc?si=V8E-D0y4hAY9GRhn
If you are still facing difficulties in adding an H1 tag to a custom theme, we recommend reaching out to the theme support team and requesting direct assistance from the theme creators.