@Vitalsigns
It is very possible that it is baked in the sim card, but since your phone is from Samsung direct it has no carrier software. Certainly some apps are added via the sim activation but it doesn't touch firmware, but that doesn't mean that feature designs of how their service can be managed could prevent access to the sim management tool.
Only direct contact to a bell support level could speak directly.
Your direct question on how or can you use the sim management tools available to you, based upon my own research I cannot answer. The answer given tells you how to avoid roaming charges, but leaves the tool set question unanswered.
The basic information provided by Bell that I could find, but does not speak directly to your question about sim management tools on Samsung and my own pixel and I see the feature exists on many Android phones and on iPhones.
It is an interesting feature as if it works as designed when travelling we could keep access to our phone and text and dedicate our data usage to a travel esim if our use needs justify this over roaming or disconnecting from calls.
The one exclusionary clause I saw on Samsung and pixel was, if your carrier permits it. That is a question for Bell support directly. samsung support may be able to help to but may just send you back to Bell but worth a try.
Great question to learn how Bell interacts with what is a common feature on current phone versions.
Keep us updated to date.
Wish I could help more.
Enjoy you time out of country.
Bruce
