Yes, Galaxy M21 SM-M215F/DS is eligible to receive the Android 11 Update!
Samsung Galaxy M21 running Android 11 has just received the WI-FI Alliance certification; hinting that the Galaxy M21 will get the Android 11 update very soon!
Date of the Last Certification: 2020-12-10
Brand: Samsung Electronics
Product: Galaxy M21
Model Number: SM-M215F/DS
Variant Name: SM-M215F/DS
Category: Smartphone, multi-mode (Wi-Fi and other)
Operating System: Android, version:11.0
Frequency Band(s): 2.4 GHz; 5 GHz