Walking or cycling?

Pro tip for a total amateur/sports enthusiast.
Is it worth going on a so-called “bike”? (this behavior has become common among people who want to lose a few kilos)
According to the trainer, it is a bit overrated.
Slow cycling is more like sitting, not doing sports.

Walking, where you engage the muscles of the whole body, will bring more benefits than cycling without changing the heart rate.
Of course, we are not talking about regenerative training of a person who is following a training plan.