A lot of crap is talked about patching tyres… I carry a standard external patch kit- bits of “string” and tube of goo, plus CO2 cartridges. These are very reliable if fitted right- they can leak air but they rarely fail completely, BMW’s “40mph and 200 miles” is purely from lawyer paranoia, liability protection. The most important thing is that if a patch does fail, all that happens is you get the exact same puncture back, some people talk like it’s a death sentence.
Once I get home I replace with an internal “mushroom” plug- the reason being these are 100% reliable if fitted right- they’re vulcanised in, but also the air pressure forces them into place- there’s no way they can come loose as long as there’s air in the tyre.
The only exception is big punctures with lots of carcass damage, and sidewall damage. Oh, and I don’t like to patch near the edge, but that’s just a personal paranoia. Probably 3/4 of the miles I’ve done on motorbikes (70000 or so) have been with at least one plug in a tyre, including trackdays 😉