WQ 9.0.2-1
I have neither maxed Tailoring /Enchanting in BfA - nor Alchemy in BfA or Legion - I did check WQA to alert me of skillups, but WQA does not seem to pick them up.

Examples:

• Enchanting quest in Vol'Dun and Najazar were missed
• Alchemy by the Kirin Tor was missed.

I did check Rewards->Expansion (Legion/BfA)->WQ->Profession->Skillup/SkillupMaxed

I am also having this issue, with cooking WQs in BfA (at least) and Tailoring WQs in BfA and Legion.

This feature is a bit cumbersome. You must go to the options and disable the "Skill is maxed out" option.
At first I wanted to detect your skill level automatically and this was just meant as a placeholder.
Maybe it would be better to rework this option to something like a simple "Always track this profession"

Does this fix your problem?

The wording is confusing, but even with all of those unchecked, it still isn't showing me work-order world quests for my professions. I just verified that by completing a legion tailoring work order that bumped me up from 98 to 99.

Similarly, there's a cooking recipe workorder available in BfA, and it isn't showing up on my list. Rank 3 Loa Loaf