You cannot install ACR 13.2 into Elements 2021. The Elements version of ACR is a crippled version of the the full Photoshop ACR and I am willing to bet that it will not include Super Resolution in the foreseeable future.
Apart from obvious marketing reasons to keep a difference between the 'consumer' and the 'pro' Adobe softwares, the technical reason is that the feature is very slow and requires a lot of hardware and GPU power. It's not a feature expected to be widely used. It works well if you expect very big enlargements or if you want to enhance old files with limited resolution. One of my 35 MB Fuji raw files required 5 minutes to be processed.