Weird looking glyphs while installing vim-devicons for neovim

I was setting up neovim, and was installing air-line by using Plugin manager vim-plug. There I noticed some fonts missing (rectangle box), for which I installed JetBrains Mono Nerd font which gave me

in the air-line status bar in neovim, which isn't also since it can be seen that some icons are overlapping each other.

I then tried installing vim-devicons to get some fancy icons, but that gave me this

The strange glyphs can be seen. While looking at the :help airline-customizations, I noted some of the symbols there for old-vim-poweline fonts are also the same rendered glyphs.

It looks to me like glyphs that could not be rendered properly, unlike the not-installed characters.

For this, I checked the readme(s) for the vim-devicons, and several others, which seemed to be saying that I need a patched Nerd Font. I downloaded already before JetBrains mono, I also tried some other font e.g. Fira Code, but no success!

I tried adding the line let g:airline_powerline_fonts = 1 in .vimrc file as well as tried adding those airline-customization suggested lines, but it didn't work.

My system is

5.19.0-45-generic #46~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Jun 7 15:06:04 UTC 20 x86_64 x86_64 x86_64 GNU/Linux

Okay, finally got which fonts were missing. It was not getting installed somehow with the Nerd fonts I tried installing.

It was solved by installing Symbols Nerd Font which has only symbols(glyphs).