My office build version is not updating to show new icons

Sunil_Racha 

Try to uninstall and reinstall it through Click-to-Run at https://portal.office.com but this will depend on your organization's setup. If you are setup for Semi-Annual, then you will get Semi-Annual etc.

I checked your version and it is the latest under Semi-Annual Channel.

https://docs.microsoft.com/en-us/officeupdates/update-history-office365-proplus-by-date

You can try to change the channel to Semi-Annual Channel (Targeted). The modern icons was release on Version 1902: March 12 (Build 11328.20158)  

https://docs.microsoft.com/en-us/officeupdates/semi-annual-channel-targeted-2019#version-1902-march-12

-and-

Version 1904: April 29 (Build 11601.20144) on Monthly Channel. 

You can refer to this link if you want to switch to Monthly Channel. 

https://support.microsoft.com/en-ph/help/3185078/how-to-switch-from-semi-annual-channel-to-monthly-channel