I could be wrong but I do believe that those nations that have their CBDCs will have legal tender for Bitcoin and cryptocurrency.
I’d vouch for the opposite: Launching a CBDC, whilst setting a foot in the crypto playing field, is really an extension of the FIAT system and the currency within the country. Adapting bitcoin as legal tender from there is still a very big leap, as it represents losing government power and grip over the currency (i.e. no printing machine in bitcoin).
I'd probably phrase it even more strongly than that. Various governments have been talking about the supposed benefits of CBDCs, like increased financial inclusion for the unbanked and such. However, I'm
far from convinced that any of that is actually true and strongly suspect they just want far greater surveillance and control over peoples' spending habits. I don't believe for a second that they would invest time, money and effort into creating their perfect spyglass/intercept/expropriation tool, just to then undo a large part of their new-found gains in power by handing greater autonomy back to the people by encouraging them to use peer-to-peer money. It's just not realistic.
I think the primary cohort of nations adopting crypto will be the ones openly waving their middle finger at the IMF/US/general Western hegemony/etc.