Missing H1 Heading

Site URL: https://www.richardsaltermusic.com/

Hi all.

My site is built on one page with anchor links to all the pages.

On a Semrush scan it says my H1 is missing, which I'm told is really important. In my research I saw that this H1 can be accessed when I go to "edit site header", then click on site title & logo. Is this correct? I've got my name in there but Semrush says I've still not got an H1

Can somebody please help?

Thanks in advance.

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