I definitely recall someone looking into it. Trying to make them work with minimal modification, iirc. I think they found that, unsurprisingly, apple seems to have added something into the communication to prevent it from just working with / being compatible with standard USB-C PD. It looks like PD communication, and iirc, parts of PD seem to be there, but it will not start charging USB PD devices.
And one has to note that Apple’s Magsafe is charging only. No data at all. Quite a few people seem to be hoping for charging and data, full high speed thunderbolt data at that, over a single magnetic connection. That is just not possible safely, and also inexpensively. It looks like the cost would be so high that it’s just prohibitive.
~edit~
Here is where a community member was trying to get Magsafe 3 cables to work