Safari Issues

Hello
My #anchors don’t not work in Safari :-(
AND: All the #anchor links don’t work on the Apple smartphone. It’s also SAFARI.
AND: There is no back to top button on the mobile version – any advice where to activate that?
AND: I have a problem further down with the font settings for my IMAGE WITH HOTSPOTS – in LEISTUNGSANGEBOT.
I have quite some text to show here and need to reduce the size of the font. But this doesn’t work so I used h6 as a font size. But formatting gets really tricky, because I cannot make a next line command <br>. It won’t show.

Thanks Nora