SharePoint Online: Term Sets split to multiple refiners?

Hey there

I have a Term Set named "Level1". In that term set, I have a term that is called "Level2" and under that, I have several other terms - "Level3". In my SharePoint libraries, I'm using a column that is called "level3field" and is linked to the above term set.

Each of those terms has a corresponding id. With the SharePoint search, I figured that with the following queries I can get exactly the search results I'm looking for. E.g.:

• GP0|#termid - Returns all items tagged with that term
• GPP|#term id - Returns all items tagged with all child of the term
• GP0|#0term id - Returns all items tagged with that term, but without the child terms
• GTSet|#term set id - Returns all items tagged with a term from the term set

(source)

This is perfect if I know what to look out for. However, I would like to have those different levels show up as an individual refiner for each level. E.g.:

• A Refiner that shows all "Level1" terms
• A Refiner that shows all "Level2" terms
• A Refiner that shows all "Level3" terms

Do you know if that is possible with the current setup? If not, what would I need to change? I would like to avoid to create 3 columns in my libraries, each with the same term set assigned even though the relation from parent-child of those terms would already exist and can be replicated in 1 column.

I created a mapped property for the column "level3field" and assigned it to the corresponding crawled property to get it as a refiner, but then I only see "Level3" terms (as this is the one that is filled as metadata into that column "level3field". There might be a case where I have to add the "Level2" metadata to the "level3field", but then again, everything would be beneath 1 refiner, instead of 3.

I would really appreciate your help.

Thanks and kind regards,