If I remember correctly there was a "blatantly off-topic" option in Flagging > Closing > Off-topic (while flagging a question). But while closing this question
https://askubuntu.com/questions/968073/what-does-it-mean-physical-realty-of-speech-sounds
I couldn't find that option.
Is there any particular reason why it is removed? Should we also refrain from adding using a custom reason/comment like "blatantly off-topic" while close-voting (or flagging for closure) a supposedly off-topic question as I did here?