i recently used this to download a PDF of an industry standard i legally had access to in a DRM-PDF format which i could not open on my computer. completely legal according to local legislation, just as long as the publisher doesn't find out ;-)
never used a huawei phone, but the huawei stuff i have used has been as bad as google & apple vis a vis taking linux, locking it down, & then pretending its somehow opensource
it is a dash. you could use an em dash - or a 2em dash - but this dash is probably shorter than 1em - unless like me you have a monospace font. if it can be a hyphen-minus, it can be a hyphen/minus/dash. and that is what it is, because that is how it is used, ASCII be damned. the english language and its typography is beholden to neither ASCII™ nor UNICODE™.
a short dash - with spaces around it - is clearly a punction mark, not a word-joiner. what nonsense! anyway, you can not expect everyone to use 4 or more different key combinations depending what style they want. the only solution is to make firefox, word, etc choose the right dash for word-joining, punctuation, minus, number ranges, etc. somewhat similar to how they can choose the width of spaces in justified text.