Download Android 11 Beta Fastboot ROM for Redmi K30 Pro from here. Download MIUI V11 from here.
Archive name: lmi_android_images_0.06.16.native.user_20200617.0000.00_11.0_b147ec6db8.tgz
Xiaomi Device name code: umi
Archive size: 1.7 GB
Android version: Android 11 Beta
Note: Flash it on your own risk
Caution Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data. BTW, a link doesn’t last forever.