Are prolonged Sword clashes actually LS, and not AP?

[Dark_Soul20189]

So I came upon this staff thread, and remembered that LS can be used to hold someone down.

Expanding the Lifting Strength page

This is the current content of the Lifting Strength page: Lifting Strength is defined as the mass that an individual can lift on Earth. In other words, it measures the amount of upward force a character can produce. As such, pushing and pulling feats are also considered part of this statistic...

vsbattles.com

So I am wondering, why doesn't prolonged sword clashes count as LS, since after the initial impact, it's no longer a "strike" force, but rather an "pushing force", basically a pulling force, but in the opposite direction, so why doesn't this count as LS?

 

[KLOL506]

I haven't seen a singular profile that doesn't treat this feat as LS, hell, there are no rules against sword clashing proper.

 

[Dark_Soul20189]

I haven't seen a singular profile that doesn't treat this feat as LS, hell, there are no rules against sword clashing proper.

I just think it would be good to add it to the LS page ot make it clear.