https://iconmonstr.com This site has many black and white icons created by Alexander Kahlkopf
https://www.flaticon.com This site same many free and paid B&W and Color icons
https://icons8.com This site also has many B&W and Color icons, but some icons are only available as png images for free, for SVG or higher resolution you need to pay.
Thanks – today I needed an icon and used one from one of these websites.