@Zikri_Zainal - just for clarification, are you looking to add some calculated number in the description of the hamburger menu item (eg: 1. Defects (15))?
If so, you can already do that by just adding a VC that contains your calculation, and then use a calculated Display Name for the view you are showing in the hamburger menu.
In my case it’s not a count, but I am showing the date of last data upload in the menu. You could show a count quite easily.
CONCATENATE("Last IPS import => ",
LOOKUP(“Date of last IPS data import”, “Show Last IPS Import Date”, “TOPIC”, “DESCRIPTION”))
Since my actual use case was a bit convoluted, the simpler example for your case (using a VC called DefectCount in the your DEFECTS table might be:
“Defects (” & [DefectCount] & “)”