@hacks4pancakes my solution to this historically has been a charger that has a standard iec spec inlet rather than a wallwart and then just buy a mains cable (in country if necessary), or borrow the cable out of the tv/radio/whatever.
Also more likely to fit in awkwardly placed sockets that are too close to something else, & less likely to fall out of worn hotel outlets as there’s no heavy “brick”. Does require a bit more bag space, but you only ever need the cheap bit then.