The Federal government has chosen to back CCS. Why would they want force Tesla to open up their non-CCS chargers?
I don't see it happening here. Even when the EU imposed CCS by law, it wasn't backdated, it just affected new installations.
Ford probably came to the conclusion that not only is Tesla ahead of everyone in the charging world by sheer numbers, but Tesla's tech is also better tech and easier to use connectors.
Those CCS fast charging connectors are pretty large. Someone who is smaller might struggle to maneuver that thing. A relatively small kid can handle a Tesla charging plug quite easily and the charging plug is universal to application, it's the same for both DC and AC chargers.
Someone in another thread or possibly this one posted a video made by Edmunds where they did a tow test between a Ford F150 Lightning and a Rivian over a route from the suburbs of Los Angeles, over the Grapevine, out to Mojave, and back. They talked about the roulette you have to play with CCS charges working or not. That's much less of a problem with Tesla chargers. I have run into some superchargers with problems, but it's much rarer with superchargers than with CCS.
CCS is also way behind with very fast chargers. There are a lot of 50KW CCS chargers around, but the high power chargers are few and far between. It also require some digging to find out whether the CCS charger you're headed to is high power or not. It's a lot of work that takes someone with some skill to sort out. With Tesla, you can know for sure that the slowest chargers are still three times the power of the slower CCS chargers and you can almost be certain that there will be some stalls working fine when you get there. You may have to wait, but at least you know when you plug in you're probably not going to be stuck there for 2-3 hours waiting to get enough to get to the next charger.
I have never used a non-Tesla fast charger, but I have seen videos and read articles from people who have and the experience difference is night and day. No worries about entering your credit card information, worries about which network the charger is on, worries about the speed of the charger, worries about whether the chargers are all down, or whether the two chargers available at the location are in use with a line. There are some small supercharger locations, the smallest I've seen is 5, but all of those locations now have alternatives with a large number of chargers fairly close by. Unless you pull in with 1% state of charge, you can make it to the larger location nearby.