Seems we can’t mix type of content in same repeating group, am i right ?
Yes and not. Basically, you cannot using the dynamic type set to the type DB, that only allow one type.
But you can set it to text and use the unique ID of elements and use a Do a search to find the correct data from the current cell text.
But this also mean that you will need to do differens groups/elements that will display the data that belong to DB type. A lot of conditionnal if you merge different type.
You can consider to create another DB with the information your need in RG and a link to the related thing.