System: ODROID-HC1, ARM 32-bit, Armbian 21.05.8 Focal Client v22.0rc2:
$ bitcoind -version
Bitcoin Core version v22.0.0-g873fbc745d037ad43570f81e58334c397bc95477
Started IBD from scratch (with txindex=1), now synced up to height ~510000.
According to data provided by htop tool, all additional script verification threads were idle since IBD started:

Is such behavior expected?