If you want to set custom icons for elements like tabs, file explorer, file finder, etc, just add this following config to the entry hooks.after_setup in better-vim.lua file:
better-vim.lua
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return { hooks = { after_setup = function() require("nvim-web-devicons").set_icon { res = { icon = "ﬦ", color = "#e6484f", name = "ReScript" } } end, },}
Since we’re using nvim-web-devicons as our icons plugin, you can see more about custom icons on its official documentation.