Create a fixed map and update only position of vacuum

[veniplex]

Hi,

so this might be a very advanced question, but here is the situation:
I have a Roborock S5 and I live in an apartment with a two-step staircase in it, so my Roborock is not able to move the stairs by itself - obviously 😆. Therefore I run into two problems:

1. The map is always updated for each half of the apartment (staircase is in the middle). The other half is removed as soon as the vacuum cleans in the other half.
2. When I want to use zone cleaning etc. I cannot mark the zones / rooms, because the current map doesn't know these rooms.

Is there any possibility to create an initial map which can be used as base map? Or can I create two maps and merge them together in any way?

Thanks for every hint.