Here’s the odd thing about IQ scores. They measure capabilities, not skills. Or at least that’s the theory.
So it’s at least as likely you enjoyed sewing and were good at it because you had the spacial reasoning capabilities needed.
The whole idea behind the abilities measured by IQ tests is that you can’t improve your score by practicing.
I am agnostic as to whether these theories are entirely accurate.
iq tests are like any one-time static test.
You can score better or worse depending on the time of day you take them. Your brain does certain kinds of tasks better at certain times ofthe day. Depending what is going on in your life any given day can affect concentration and thus, test outcomes.