[Redmi K20 / Xiaomi Mi 9T Questions & Answers] Kogar:
Seems like the same as with the K30 (CN) happened. Google Play Service don't seem to work with MIUI 12.1.1 (OTA update) for the Redmi K20 (CN) for me.

https://xdaforums.com/t/redmi-k30i-cn-android-11-play-service-issue.4225973/

Quote (for Redmik K30 5G): "Miui 12.1.6 RGICNXM seems to work ok google services framework 11 "

https://xdaforums.com/t/android-11-update-and-google-play-services-error.4196723/

Hopefully Xiaomi/Redmi will also release a reworked Version like for the K30 5G (MIUI V12.1.6.0) ( https://xiaomifirmwareupdater.com/miui/picasso/ ) where they seem to fixed that issue? Took them a whole month (from January to February) for the K30 and they still release MIUI 12.1.x for other devices and are cripling google services. . .

Are they incrementally testing how much ****storm they will get if they really remove google services for MIUI 12.5 for all non global devices?

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Edit 2021.03.10:

Another K20 User from the comments:" i'm using the China version of K20 in Singapore, and the latest update to 12.1.1 messed up my phone big time. Can no longer use most of Google apps, including Google Maps, Chrome, and other apps like Grab. "

Redmi K20 gets the Android 11 update in China - Gizmochina

Xiaomi launched the Redmi K20 in India and China while the company brought the same device as Xiaomi Mi 9T in other regions like Europe. The device, irrespective of regions, came with MIUI 10 based on Android 9 Pie out of the box. Now, it has finally started getting the Android 11 update. The...

www.gizmochina.com

From the comments - Amadan (18 February, 2021): " I tested most of the models in a Mi Home store in China today. Basically, it seems that all China only models that don't come with Google services pre-installed no longer have access to downloading Google in the app store. They can't be downloaded on the k30 ultra, Redmi note 9 pro 5g, Redmi 10x, and Redmi k30s. I tried those today but they can on the mi10 and mi11 as they are models that are also available internationally and have been certified by Google. It seems that they didn't certify China only devices with Google "

Xiaomi blocks users from installing Google's GMS on its smartphones in China - Gizmochina

Xiaomi has its own Android-based operating system named MIUI and the company has been regularly updating it. Recently, some users of MIUI started reporting that they weren’t able to install Google Mobile Services (GMS) on their smartphones. The restrictions seem to have come after the rollout of...

www.gizmochina.com

google translated from the announcement: "Some domestic models have pre-installed the GMS service framework, and these models will not be affected. For models that do not have a GMS framework pre-installed in the system, users will no longer be specifically supported to install the GMS framework by themselves. In the future, we will add more models of GMS systems pre-installed to meet your needs."

Xiaomi confirms no GMS framework for future phones running MIUI China ROM - Gizmochina

A few days back, news broke out that Xiaomi is blocking users from installing GMS (Google Mobile Services) on its devices running MIUI China ROM. To this, the company has now issued an official statement. Xiaomi posted an image on Weibo via its ‘Xiaomi Company Spokesperson’ account. This image...

www.gizmochina.com

Am i interpreting it correctly that GMS is not preinstalled in MIUI 12.1.1 so GSF is not working. They removed GMS from already sold phones by OTA updates?

They now are testing how much needs/questions arise for already sold phones?

"In the future, we will add more models of GMS systems pre-installed to meet your needs"