I've done quite a bit of research into this. I live in a very, very snowy climate. I have the 21". And, as a result of the low ambient temperatures and snow and ice packed on my roads, I've only been able to drive my car about 90 miles since delivery late last year.
Short answer: NO, there is no compatible 21" all-season or snow. (I have a very good tire shop and a very good relationship with the ownership). Nothing that's both designed for the load, LRR that Lucid specs.
Long-ish answer: You can order 19" wheels from Lucid. (I emailed customer care and they got me in contact with my local tech who called me right away and offered to come to my home and swap out my wheels and tires). Lucid will offer you either the 19", all-season version of the Lucid-spec Pirelli Elect HL (not be confused with 'xl' tires), or Pirelli Sotozero3 tires. (NOTE: your local tire shop will NOT be able to get the all-season Pirellis as the manufacturer shows them backordered with no restock date. So you are best getting them from Lucid. They should easily be able to get the Sotozero 3). I don't remember pricing on any of this, but it's all reasonable. (NOTE: aero covers are on back order, so get your tech to order you some ASAP, since it will likely take a while).