Like all resins, there are different hardness ratings, and different strengths that they bond to surfaces at. Bondic (one of the more popular brand names for these adhesives) and all of the other “home repair” type ones are nowhere near as strong as 2-part epoxy, and many of them (including Bondic) are marketed as being removable. E.g. I use bondic to add a bit of extra thickness to the inside of my slightly-too-large wedding ring. If I clean the inner surface of the metal really well, and do a LONG cure with the resin (1-2 minutes using MUCH brighter lights than the one that comes with the kit), I get 2-3 months before it eventually peels off and needs a new application. I’m sure there are stronger UV curing resins (which hopefully someone else will weigh in on) but those may be out of reach for the general hobbyist.
Additionally, UV cured resins require UV light to penetrate all the way into the resin in order to cure, which makes them useless for bonding opaque things like your pins – you’d get a cure around the outside where the light can reach, but it would remain fluid and un-stuck in any parts covered by the metal/acrylic.