Unlike Samsung, Realme does not give priority to its high-end phones when it comes to rolling out regular security patches. All the Realme phones that have picked up the June security patch are either budget or mid-range phones. For Realme C11, the latest OTA update comes with the firmware version RMX3231_11_A.79. Realme Narzo 20 and Narzo 50i are receiving the update with the firmware version RMX2191_11_C.17 and RMX3235_11_A.29, respectively. All three Realme phones are mainly getting the June 2022 security patch and some improvements to system performance and stability.

Realme C11, Narzo 20, Narzo 50i June update changelog:

Security Integrates the June 2022 Android security patches. System Optimizes system performance and improves system stability.

The latest OTA update for Realme C11, Narzo 20, and Narzo 50i is currently available in India. It will expand to more regions in the coming weeks. As you might have guessed, the update is rolling out in batches. So, there may a delay in receiving the update on your phone. Alternatively, you can go to Settings » Software update to see if the update is already available for installation. source

Realme C11  Narzo 20  and Narzo 50i receiving June 2022 security update - 92