workflow has below criteria rule of formula type :
OR ( ISNEW() , ISCHANGED( Description ) )
when i try to migrate this WF rule it gives me an error of saying : We can’t migrate this workflow rule because it contains an unsupported formula..
But according to https://admin.salesforce.com/blog/2021/go-with-the-flow-whats-happening-with-workflow-rules-and-process-builder,
"Flow formulas support ISCHANGED(), ISNEW(), and PRIORVALUE()"
I am little confuse.
Thanks In advance
Automation To Flow (Beta)
Regards,
Amit P.
Eric Praud (Activ8 Solar Energies) 
Forum Ambassador
ISNEW() cannot be added to an entry criteria as such, it can be added to a condition after the entry criteria though.
If you create a before trigger flow, you can mimic it by going with:
Id - Is null - $GlobalConstant.Fasle, but the migration tool will not do that for you
