You can follow the documentation on the git repo, where both methods are described.

https://gitlab.com/flauncher/flauncher#set-flauncher-as-default-launcher

🙄 https://gitlab.com/flauncher/flauncher

What I like about termux:

• A real shell that can be changed for zsh and ohmyzsh, for example

(https://github.com/zsh-users/zsh-syntax-highlighting and https://github.com/zsh-users/zsh-autosuggestions are really handy for quickly reusing familiar commands without having to retype everything, which saves a lot of time on a day-to-day basis)

• numerous packages available

The only flaw I've found with termux is its use of google dns :(

https://github.com/termux/termux-packages/issues/1174