Very unprofessional - would avoid!
I applied via Indeed and received a next step assessment offer (on Indeed). I was then contacted via WhatsApp (which I found a bit intrusive) to set up a call to discuss the role further.
We scheduled a time but the recruiter never called. 35min after the suggested time I asked if we could potentially book another slot as I couldn't wait any longer.
Same thing next day, no call or update. Just rude, unprofessional and a waste of time for everyone. Would avoid!