Tesla do have their own custom chemistry and doping, it is written all over the internet you're willing to read that.
TEsla has several patents and their own research group: https://www.scribd.com/document/440951044/Tesla-battery-pate...
https://www.scribd.com/document/424878572/J-Electrochem-Soc-...
just to name a few. to me you seem like a Tesla skeptic, unwilling to acknowledge their success
1: https://iopscience.iop.org/article/10.1149/2.0341813jes/pdf
Undoubtedly good chemistry research but doesn't have anything to do with the batteries that are actually in cars you can actually buy.
Claiming Tesla is the same as VW which basically buys batteries and shoves them into existing chassis\frames, is a joke.
Tesla produces most of the worlds batteries:
https://www.mining.com/muskmobiles-running-rivals-off-the-ro...
In their own factories, which automaker has this level of integration?
Tesla has the best battery longevity metrics according to thousands of tested cars: https://electrek.co/2018/04/14/tesla-battery-degradation-dat...
Tesla is the only company with vast\robust charging network: https://hbr.org/2021/01/how-teslas-charging-stations-left-ot...
Tesla is the only company seriously investing in their own battery facilities. boots on the ground, working facilities.
Now tell me how Tesla is just like any other player in the EV space again?
1: https://iopscience.iop.org/article/10.1149/2.0341813jes/pdf
Undoubtedly good chemistry research but doesn't have anything to do with the batteries that are actually in cars you can actually buy.