I can say with a lot of certainty that the Cooking Mama: Cookstar game does not have any kind of cryptocurrency miner of any sort.

Reverse engineered the Rom and found nothing indicating cryptocurrency or blockchain or anything of the sort.
It's just a typical ol Unity game dude

Here's a big expansive file listing:
https://0x0.st/iu3T.txt 

All symbols found in the main executable:
https://0x0.st/iu3l.s 

I found this url in
`Data/StreamingAssets/Switch/scoring_data`
https://drive.google.com/drive/folders/1Nhp-F3q_q5Rs9PQtCcKHKZt8ujpv0l-A

I found this url in
`Data/StreamingAssets/Switch/recipe_data`
https://drive.google.com/drive/folders/1cGFP43F9v6dX84qaQIQyf91PAw_GgfR_

Bunch of strings extracted from the main executable
https://0x0.st/iu3C.s 

Anyways I think you get the point now.

"Cooking mama mines bitcoin on your Switch"
I really doubt that the Tegra X1 T210B01/T214 SoC can mine _anything_
Let alone bitcoin/ETH/XMR/etc
Let alone mining while sustaining Unity-engine gameplay at the same time(which is probably heavier than mining crypto these days)