Novaliss "Dual Sim, Nano-SIM and eSIM"
Yes, Dual Sim , in this case, means 1 Nano-SIM and 1 eSIM. Dual SIM just means, you can use 2 SIMs active parallel, it doesn't say anything about what type of SIM.
Scatterbrain I guess I don't really understand as I am thinking of the esim being 'applied to a second user account', but it probably doesn't work like that.
Yes, it seems like a misunderstanding. What I wrote about profiles has nothing to do with the usage of SIMs. User profiles on Android/GOS you can imagine like different user accounts on a PC, in simple words. (Actually it's not exactly the same, of course.)
You can use both SIMs/phone numbers parallel at every user profile - of course also, if you just use one, the main ("owner") profile. You can make and receive calls and SMS through both numbers. You can define in settings either a default number for outgoing calls and SMS or if you want to be asked, which one to use for every call or SMS. Also you define the default number for mobile data (network). These defaults doesn't have to be the same, you can define it for each of the three kinds (calls, SMS, mobile data).
Since English isn't my first language, please apologize if I wasn't able to explain it any more clearly.