Dummy only at night? Is this possible?

Yes. We used a dummy only for naps and night time. We then got rid of it at 6 months because it was a hinderance at that point. It was a great sleep cue and helped her horrid reflux.
Never had it in the day when awake.

We had one that never left the bed. Was no problem to give up at around 9 months. Good luck!

Yes, we had a 'dummy for cot' only rule and that worked well. Too well. He still sleeps with it now he's three.

We had a dummies for sleeping rule. Was allowed it in car if it was nap time and in bed. Worked for 3 years with no fuss!

Yes, dd had a dummy at night and for nap times, she never looked for it during the day and we never offered it. It made a massive difference to her settling to sleep and sleeping for longer at a time. We stopped her having it at 18 months when she kept throwing it out of her cot and then crying because she couldn't sleep without it. She has a comfort toy too and adjusted to sleeping without the dummy surprisingly quickly.

Yep we do this, lives in the cot only taken out if they are due a nap in the car or overnight journeys. Sleep only. Worked for both of mine

Yes we had a dummy for night time and nap only - for 2 blissful weeks it worked a dream but he completely refuses it now 😩

We have a dummy just for sleeping for my 2 year old - that's the only time she really wants it anyway.

I do sometimes give it to her in the car but that's more to shut her up - she never stops talking which I sometimes find a bit distracting when driving.

I give my son a dummy to get him off to sleep & then once settled, I take it off him