Liam has now confirmed that he has an SE for next week.
Why because he reached his first challenger QF for a year? SE should be for SF as a min.
His QF match was as mentioned weather delayed. I don't know the precise rules ( though there are rules and defined priorities if too many in theory eligible for SEs rather than a gift at anyone's discretion ). It's much more about whether you can practically get to the next qualifying rather than the round reached.
Sometimes depending on scheduling, certainly at some levels and more particularly if the following event is relatively near, a SF place would not give a SE if the player could make qualifying
ie. it's not so much a reward as a practical matter of allowing the player to compete the following week rather than be unable to compete just because they progressed so late into the previous week. Seems to me a very good provision.