Btw solipsism is Flat Earth tier philosophy for narcissists.
If you look at it from outside perspective, a genuine solipsistic individual is indistinguishable from psychotic egocentric narcissist, pretending reality outside his mind is fake.
A real analytic approach would examine the "state of reality" before making claims from a personal perspective:
Its a 'Virtual reality' but what is his part in it?
Is it 'illusion', but how its constructed and what is behind it?
Is it a 'dream' who is the dreamer and what is the plot?
A solipsistic approach just fixates on the individual and not the process of 'perceiving reality', its not explaining anything in terms of finding a 'true nature' because solipsism denies other minds who would define/construct such ideas as figments of his own mind.