it is sweet. quite a common Chinese/Cantonese roast pork.
there may be some place that sells the sauce like this which you can try to make yourself
https://www.amazon.com/Lee-Char-Chinese-Barbecue-Sauce/dp/B075NT2TQ3/ref=sr_1_1?crid=2J58F61Q0CHNB&dib=eyJ2IjoiMSJ9.nLOqYqByienlWZNDoqFlwhQd8W2YCxWy2SbXIJCQMqP7bNBb6juT_JKS-2rvGQ2bFeuYQ9wNxux8TjxzUHVlKejM_1gsgEQkLCf2DDSNl1sVeywG96ef2yUcvElO592_bACnRbOf7rVo8ElaDDTvl3Ta-93FkE1atJgYD1XUWdcXLIYmxewTyZFQICeH-mcDhH8KNFyzkZpfVAX30ec7NTQqF6HtHLLJSb1HogsshMiOMyAxpehhv3prapGpfTz_9tAQfpBb7misXk5r6p4KXadgZmpa3IsihKvgUJokPxM.eJhK7YYJ7eTqPnVG4Zea17CVbzEkdZzvTa1sQfculvI&dib_tag=se&keywords=Char+siew+sauce&qid=1713444360&sprefix=char+siew+sau%2Caps%2C313&sr=8-1