My PFB so no experience here and not a big thing, but my DS can wee if we say 'are you weeing?'.
It started as he always wee'ed after his bath on the changing mat (and quick change of nappy and "oops, quick", so I guess a reaction from us).
Now I think he associates the word with the action and can now 'wee on demand'. Every time I change his nappy, before I change it, I say 'are you having a wee?', he holds his breath and wees (sometimes he farts, so he is forcing it out).
WWYD? Is it worth getting a potty and seeing if he will wee on the potty?
He's not been the quickest with anything, doesn't walk yet, only just got his first tooth, so I thought we wouldn't be doing this for a while yet! I really don't think he will be old enough to anticipate needing to go, so the next 'step' might not be achievable for a while anyway.
Thanks for reading.