MyRocks/RocksDB: possible to use the "Plain Table" SST format?

I read here that the SST-files created by the RocksDB storage engine can store tables in 2 different formats:

• "block-based"
• "Plain"
  I'm currently using the default MyRocks options of MariaDB 10.4.12 and I assume that the SST-files of the "default" column family are currently using the "block-based" format => if this is correct, is it somehow possible to use the "plain" format and if yes then how?

Reason why I'm asking:
nothing in particular, I'd just like to try that out to see if in my case it presents any advantages compared to the "block-based" format.
I haven't been able to find any informations related to this in the context of MariaDB/PerconaDB/MySQL.

I must mention that so far I don't understand much of how MyRocks works - so far I only dared to change the compression algo of the default CF.
Thank you.