GerryAZ said:
The Tesla to J1772 adapter is designed to allow a Tesla to charge from a J1772 (Level 1 or Level 2) EVSE. It has nothing to do with the Tesla supercharger network. Theoretically, an adapter from the Tesla supercharger plug to the CHAdeMO connector for DC quick charging a LEAF could be manufactured if Tesla were willing to support it.
And, the chance of Tesla being willing to do that in the US is almost nil, unless there's significant $ in it for Tesla (e.g. govt $).
In the US, Tesla has added a "magic dock" (integrated CCS1 adapter) to a very limited set of their Superchargers (so far) which enables CCS1 cars to DC fast charge on them. I'm guessing this will expand to more sites. See https://www.cnet.com/roadshow/news/how-to-charge-your-non-tesla-ev-at-a-tesla-supercharger/, for example, including the brief video.
No Leafs come with CCS, so for now, they are out of luck. Currently, only two vehicles sold/leased as new in the US come with/can have CHAdeMO: Leaf and Outlander PHEV.
Nissan moved to CCS for North American Ariya. And, EA has already sabotaged CHAdeMO (1 CHAdeMO plug per site and no new sites with it outside CA since 2022: https://insideevs.com/news/522882/electrify-america-ends-chademo-installations/). All the rest/pretty much all the rest of non-Tesla consumer highway legal BEV automobiles sold/leased in the US as new now have CCS1 inlets.
Tesla also quietly discontinued selling https://web.archive.org/web/20210309023825/https://shop.tesla.com/product/chademo-adapter in the US years ago.
So, maybe the OP can see why the odds of Tesla doing that are so are low?