My boys have never really slept in cots they like to cuddle to sleep so we just get to bed room place and put them in a normal bed. Or we've got travel kids blow up beds and use them. When they was younger we would let them sleep in the pushchair unstrapped, blanket over the straps so more comfortable and they use to sleep all night able to roll and mover a bit. We did have one oopppss where my youngest fell out the back off pushchair once but she was okay didn't hurt her self and went bk off to sleep but I had big pushchairs that laid flat
Never like travel cots as they so low down and can't get out so mattress help. We've stayed in hotels with single beds on floor even my 20month old been okay there
We bought an XL travel cot which is from babydan it’s 120x60 so same size as a normal cot, then we bought an actual mattress for it. This worked wonders for us on holiday x
No advice but following as my lad hates his travel cot too