I tested that can mobs like Witch, Vindicator, Evoker or Pillager can wear armor turns out they do wear armor but armor doesn't render on them.
Linked issues
Comments 1
MCPE-75918
Armor Doesn't render on Witch, Vindicator, Evoker and Pillager
Resolved
Duplicate
0
migrated
(Unassigned)
Unconfirmed
Android
Android 8.1.0
1.15.0.8 RTX Beta, 1.16.0.63 Beta, 1.16.0.61 Beta, 1.16.0.59 Beta, 1.14.60 Hotfix
Retrieved
Thank you for your report!
We're tracking this issue in MCPE-74242, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki