Yes mine is blank. I got confirmation by getting CSIS and CBSA notes (ask for security screening case details). They won't give any specific details, only if security screening is in progress and when it started.My security screening is not done either. Is the part under security blank in your IRCC ATIP notes? For me it does not event state "not started" and it worries me.
It seems an unusual number of people have security screening in progress for a long time. According to their annual reports they process roughly 300,000 citizenship files a year and 99.96% are processed quickly. Only 0.04% (1 in 2500 cases) usually require a report, which takes 12-18 months to prepare. But according to the forums here, 10-15% of people have security screening in progress since 2021. Something is going on. I don't know if it would be possible to launch some collective/class legal action to get the ball moving.