Debian Arm & widevine

I've been looking without success for a Debian Arm forum to post this on.

Raspberry Pi OS seem to be ahead of Debian on Arm ports, with the following:

• Buster 32bit ARMEL (suitable for any Raspberry Pi) with, I gather emulated FP
• Armhf 32bit For >=A-7 Cortex as in RPi 2 & above.
• Arm64(hf) for >=A-53 Cortex & above, the A-53 Cortex RPi 3 & A-72 Cortex Rpi 4

I'm finding the Debian stuff on Arm very difficult to find. Here's an Example: Back on Debian Stretch, there was a package in the 32 bit Arm port called chromium-widevine which gave chromium (their default browser) access to Netlifx, Hulu, Amazon Prime, Disney Plus, HBO, Spotify, Pandora, YouTube, VUDU, and many others using a 32bit libwidevine.so. It's not in Buster, 32bit or 64bit. Id like to pursue this, as it's been supplied before, but not now. Debian (last checked) doesn't have an Arm system of any sort. But I can get Raspberry Pi OS (formerly Raspbian) and it updates itself from Debian Buster repos. What's going on?