Nintendo Switch: two users with their own Nintendo accounts easily possible?

We have two users on our switch, i.e.A and B.
User A is connected to a Nintendo Account has always purchased the games in the eShop that could then be played on User B.
Now, because of the online function on user B, we would need a separate Nintendo Account, as I learned. He wants to link a new account, but you can't use the already shared account again.
Are there problems with the games purchased if suddenly two users are connected to two different accounts on the switch? Or can you still play all of A's games as B?
Unfortunately, you won't find anything on this topic anywhere.

You can set a main console for each account. By default, this is the 1st switch on which you log on. All other accounts can then use the software on this console.

If you use the account on other switch consoles, the games bought with your own account can only be played there from your own account (everyone can still play on the main console).

https://www.nintendo.de/...2574.html#

Memory cards can of course always be used with all accounts of every console - just the gamecard has to be in there.

In principle, it is the same rule as, for example, on the Xbox (it is called home console).

I thank you!