https://www.designlabthemes.com/css-loading-spinners/
CSS loading spinners - Design Lab Themes
May 4, 2019 - A collection of CSS loading spinners
loading spinnersdesign labcssthemes
https://loading-ui.com/
Loading UI - spinners, loaders, and loading animations for the web
Free and open source CSS and React loaders, spinners, and animations to create polished, accessible loading states for modern web apps.
loading uifor thespinnersloadersanimations