PlayStation has a limit on Trophies so sadly it ended with trophy support. Steam has new achievements added still. If it were like that on PSN we would be the same. Xbox One is weird, they only got the base game achievements and not all the DLC.
Sony extended the limit, although there wasnt new achievements. Maybe the DEV werent aware about it? I hope they would add now some trophies with the next DLC update. Thats the same story with warframe. They stopped with supply us with new trophies, but since the new Sony trophies extension warframe adds now some new trophies.
"Didn't" is a contraction of 'did not'. 'Did' is the past tense of 'do' and 'not' is an adverb used as a function word to make negative a word.