Is there a way to see all the accounts holding a particular asset? It is easy on Ethereum but I am hitting a roadblock on trying NXT or OMNI platform.

for NXT, I am using the mynxt blockchain explorer. So, if look at Ardor, this is the page for tokens:
https://www.mynxt.info/asset/12422608354438203866

On clicking the "number of accounts" link gets me nothing.

Similarly for OMNI, the https://omniexplorer.info/ has a property statistics link under "Smart Property". It redirects me to this link:

https://omniexplorer.info/spstats.aspx?sp=1

and the page is just a runtime error.