"Rollators

Lack of balance can lead quickly to a lack of confidence, which might mean you stop getting out and about as much as you used to. Walking aids, whether a rollator, tri-walker or just a trusty walking stick, provide an invaluable helping hand for those unsteady on their feet. Rollators are the sturdiest of the bunch, with 4 rolling wheels as opposed to the 3 you will find on a tri-walker. They provide more points of contact with the ground and as such can support more weight as you walk."

https://www.careco.co.uk/walking-aids/rollators/

"This 2-in-1 rollator walker offers help with mobility. The rollator folds for storage or for transport and can be used to help walk or as a chair. If you are looking for a rollator walker like this, do not hesitate to place an order!"

https://www.costway.co.uk/2-in-1-rollator-wal...

Just suggest removing the [Amer.] flag

There are numerous discussions in the archives, e.g.

related discussion: walker - Gehgestell

and an old thread from 2014 has recently been exhumed

related discussion: rolling walker - Gehwagen

The term is not exclusively AE, it is quite commonly used in the UK as well.

related discussion: Rollator - walker - #15