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Yes, as slang for ‘perambulator’, which is basically ‘stroller’

Not really a stroller is a pushchair.

A pram is a kind of mobile bed for babies.

Fair enough.

In my defence, I was coming at it etymologically, where (according to the OED), a perambulator is 'A person who walks or travels through or about a place' (hence 'walker') OR 'A carriage for a baby or young child, which may be pushed along by a person on foot. Now usually shortened to pram [...] a cradle mounted on four wheels'.

So 'mobile bed' is a perfect description

The word pram doesn't exist in American English, true, but you'll learn it anyway if you ever read Peter Pan.

Though even in the UK I think it has a slightly old fashioned feel -- I feel like parents are more likely to have a pushchair than a pram.

My understanding was that a pram is used for a younger child, they are laid flat. A pushchair/buggy for an older child, they sit. Language is often used incorrectly however.

A ring-sling suited us better.

I think the modern style is a multi-hundred pound (£) infant travel system. https://www.argos.co.uk/browse/baby-and-nursery/travel/trave... - up to £1500 in this relatively down-market UK shop.