MDA has mild psychedelic effects, because it has some agonist activity at 5-HT2A receptors. If you take enough MDMA occasionally those effects can bleed through towards the tail end of the roll. Very mild visuals at most. Related drugs like 5-MAPB are pure empathogens without psychedelic effects. Methamphetamine at high doses has empathogen effects without psychedelic effects as well. Serotonin release does not induce psychedelic effects. Phenethylamine 5-HT2A agonists can.

Empathogenic effects arise from serotonin release and involve a sense of profound empathy for oneself and others, desire to socialize, anxiety reduction, euphoria, etc while remaining relatively cognitively intact and without meaningful changes in visual perception. These drugs are usually stimulating to some extent. Psychedelic effects arise from biased 5-HT2A agonism and involve vivid, colorful visual hallucinations composed of repeating patterns, loss of sense of self, thought loops, etc without implicit euphoria or anxiolytic effects and in many cases without stimulating effects. Very different experiences.