Hi,
I see that there is a module called "Gauge Widget for Kanban" installed by default with odoo , so I assume it should allow you to add guage widoget to kanban board as the name suggests .. but I am not sure how to achieve that , I see no documentation for it anywhere ..
The other thing is sparkline for kanban , it is a module exists on odoo 8 but removed without any explanation anywhere on odoo 9 & 10 , where is this module gone and why it is get removed ?
Look how to add gauge widget in Odoo: https://learnopenerp.blogspot.com/2022/05/use-and-add-progressbar-percentpie-gauge-widget-in-odoo.html