Love bat, just discovered it and made my day!
I wish I was able to use the mousewheel to scroll both up and down through files too, like the micro editor does https://micro-editor.github.io/
You can already do that, actually. Depending on your version of less, bat will either enable or disable it by default to avoid bugs in that version of less.
To override it, you can either update less to the latest version, or set export BAT_PAGER='less -R' in your bash profile/change the config file at bat --config-file and add --pager='less -R' to it.
Lovely, thank you!