Verification by Deckard is "best effort" which means it is not guaranteed to happen,
for example due to build resources, dependencies, etc.
If you need a verification urgently, you can request a reviewer to do it manually,
but of course that also depends on the reviewer's ability / time to do this.
While waiting for the verification, you could continue on trying to get the code reviews
(gently ... many of us are backlogged).