unofficial twrp 3.5.1 for realme C15
offered By https://unofficialtwrp.COM

Note:
Dont ever try "adb reboot fastboot" / "fastboot reboot fastboot" inside twrp, Otherwise, endless stuck recovery mode

fastboot flash recovery recovery.img
fastboot flash vbmeta vbmeta.img

for ab:
fastboot flash recovery_a recovery.img
fastboot flash recovery_b recovery.img

flash magisk & encryption disabler via twrp