The CX is more complicated than it should be:
Interal apps --> limited to ARC (i.e. Dolby Digital Plus Atmos is the best you will get)
External device--> all Dolby formats passed through eARC (inlcuding Dolby TruHD Atmos), but NO DTS tracks (DTS, DTS-HD, DTS-MA, DTS:X)
Depends though doesn't it, Apple tv 4k box for example, netflix, disney +, apple TV all offer atmos, but only using the DD+ codec.
Apart from DTS, I don't think the series 10 is any different from most TVs?