P: "Save As" no longer appear with second monitors or Sidecar running after update to macOS Monterey

Having the same issues. The workaround with main display works, but affects efficiency. Need to disconnect and connect the monitor every time. When we can expect the hotfix? 😕😕

I'm having the same issue. I'm using a macbook with an extended monitor. I'm operating on Monterey 12.0.1 and photoshop 2022 (23.0.0). I've tried every suggestion in this thread with no luck. I did make the macbook the main monitor and was able to save successfuly. But when I moved back to extended display I couldnt save. I tried moving back to the macbook as the main monitor and no dice! I am so frustrated. !!

I'm having same issue. Have uninstalled and reinstalled photoshop more than once. But no change. When I remove the sidecar a window comes up but doesnt populate with all the info and freezes the whole program. Am desperate for a solution because this is killing my work flow

Same issue here. Running 2 monitors.  Can not export a file or save as. Running a laptop beside a monitor that is set to the main display. Laptop screen acts as secondary monitor.

apple IMac 2015, 27 '' with photoshop 2022
I set up a new test account as Admin. I opened a new ps account and it works. of course no settings, no action, but it works. I also I work with apple and a second eizo monitor, also after installing the update to photoshop, Imac (2015 27 '') did not see a second monitor. that's why i panicked and installed monterey. after installing montereyi, Imac saw a second monitor (eizo), but photoshop doesn't save photos.

Latest: if I disconnect the second monitor, and restart, all seems to work. As soon as second screen is connect, indesign and photoshop (that I know off) will not save etc. 

I had some better luck when connecting both screens via thunderbolt 2 ports, rather than one via HDMI, but not perfect 

only solution so far is run one screen. 

Whoever figured out to make the MBP the main display is a genius.  That did the trick.  I can take self immolation off the agenda today now.

THANK you!!

The sense of relief that this isn't just happening to me is palpable.  I made the horrible mistake of allowing my 2019 MBP to update yesterday (from Mojave -- held out as long as I could) because I needed the new multiframe rendering in AE 2022 and ME.  Now my save dialogs are nonexistant in PS and AE (as well as Chrome).  I had to do this four days from the International Film Festival on a 36 hour straight burn to finish comping critical VFX shots.... My director is going to have me fall on a sword.... 😞 😞 

The answer to make Macbook the main monitor works after restarting PS the save dialog will appear. (But doesn't work again when I change it back to the extended display.)