It is definitely in the Kstars log:
[2021-11-21T23:44:14.038 CET DEBG ][     org.kde.kstars.ekos.guide] - Capturing frame...
[2021-11-21T23:44:14.153 CET DEBG ][           org.kde.kstars.indi] - Image received. Mode: "Normal" Size: 23397120
[2021-11-21T23:44:14.192 CET INFO ][           org.kde.kstars.indi] - "FITS" file saved to "/home/hwa/Sessions/M33/M_33/Light/L-Pro/M_33_Light_L-Pro_60_secs_2021-11-21T23-44-14_064.fits"
[2021-11-21T23:44:14.193 CET INFO ][   org.kde.kstars.ekos.capture] - "Download Time: 0.81 s, New Download Time Estimate: 0.45 s."
[2021-11-21T23:44:14.195 CET INFO ][   org.kde.kstars.ekos.capture] - "Received image 64 out of 120."
 

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