Indeed:
> Frame: Plywood, Polyurethane foam 30 kg/cu.m., Particleboard, Solid wood, Fibreboard
An example of something that looks well-built is the Skogsta dining table [1].
> Table top: Solid acacia, Clear acrylic lacquer, Clear lacquer
> Leg/ Rail: Solid acacia, Acrylic paint
(Though the oak version, which costs more, is oak-veneered particleboard.)
Many Ikea things aren't designed to last. That table has cross-beams, so it has a better chance surviving a party where someone leans heavily against one end of it. Something like Mörbylånga [2] looks like it would collapse.
I would give the furniture on display a good shove to see how sturdy it is.
[1] https://www.ikea.com/gb/en/p/skogsta-dining-table-acacia-704...
[2] https://www.ikea.com/gb/en/p/moerbylanga-table-oak-veneer-br...