Coda Leave Tracker with Gant Chart

Has anyone built a leave or vacation tracker for employees? A quick google search revealed this excel example - https://trumpexcel.com/excel-leave-tracker/. I’m going to start putting one together, but didn’t want to recreate the wheel if someone has already tackled this use case. I didn’t see any examples in templates. Thanks!

And here is a google sheets example: https://docs.google.com/spreadsheets/d/15wZax8tr2bWZCB3cD374cS43HiiuoP_BhGwj4kLXxj8/copy