You are not able to use this icons on the websites as license of SF symbols do not allow use those symbols externally than apple's products.
Legal alternative is to use symbols from here:
https://fonts.google.com/icons
https://www.w3schools.com/icons/icons_reference.asp
upd:
https://fontawesome.com/search?m=free&o=r
(most of them are not free, but, link goes to 2,018 free icons)
and by the way you can use it directly from swift using
https://github.com/LiveUI/Awesome
or
https://github.com/thii/FontAwesome.swift
But there exist ways to do this (illegall ofc)
way 1
you can try to manually add one of "San Francisco Fonts" to your website and use SFSymbols from those font.
way 2
you can copy image and paste it to any image editor and save as png.

After this you can use it as an image on the website.
ILLEGALLY