I will say that early into HRT, I noticed incontinance issues due to tucking and sitting while peeing. I started doing keegles, and that didn't help at all. I went as far as to "squeeze" out the last drops from under the scrotal area.
What fixed the problem was when I stopped drinking caffeinated beverages. No more energy drinks, limited amounts of coffee, and almost no more than a drink a week. I can now sit to pee... although I still have the occasional accident. What I do now, is I get some toilet paper *since girls wipe after they pee* and I cover the end of my penis while I stand up and tuck. Then I throw the paper in the toilet and wash my hands.
I hope this helps.