#No, because it's not a weapon attack

The steel wind strike spell basically ignores the weapon you're using to cast it, from a mechanical perspective - you simply make melee spell attacks against up to 5 creatures within range, and do 6d10 force damage to each one you hit.

The material component of the spell is listed as:

(a melee weapon worth at least 1 sp)

The cost requirement is simply to ensure that you can't substitute a component pouch or spellcasting focus for the material component of the spell. Aside from that, the properties of that weapon are totally irrelevant.

You might be able to apply any features that are triggered by "an attack" or "a melee attack", but none that are triggered by "a weapon attack". The "spell attack" and "weapon attack" categories are mutually exclusive.

No, because it's not a weapon attack

The steel wind strike spell basically ignores the weapon you're using to cast it, from a mechanical perspective - you simply make melee spell attacks against up to 5 creatures within range, and do 6d10 force damage to each one you hit.

The material component of the spell is listed as:

(a melee weapon worth at least 1 sp)

The cost requirement is simply to ensure that you can't substitute a component pouch or spellcasting focus for the material component of the spell. Aside from that, the properties of that weapon are totally irrelevant.

You might be able to apply any features that are triggered by "an attack" or "a melee attack", but none that are triggered by "a weapon attack". The "spell attack" and "weapon attack" categories are mutually exclusive.