There is no need for a virtual roll call before the convention, unless you're trying to stop debate.
Ohio moved its deadline to Aug 23, after the Democrat convention.
This happened AT THE END OF MAY already lol.
With the passage of the Biden ballot fix in the state, the DNC plan in not necessary -- however the DNC said it is planning to move forward with its virtual roll call nomination of Biden ahead of Aug. 7, Ohio's original deadline.