Neovim's nvim-lint now supports DJLint!
I've recently submitted a merge request to nvim-lint that improved the work someone else did to integrate djLint into nvim-lint.
Sadly, none of the Python Language Servers support djLint out of the box, as far as I know, but as I recently added formatter.nvim and nvim-lint to my setup, I finally now have automated formatting on save and linting working in neovim.
If you're a fellow neovim user and find yourself writing Django templates (or any other templating language that djLint supports), time to update your plugins, and enjoy improved code quality 🥳