Can you test an Addon made for a different Format Version?

[Landosumm]

From most of the tutorials on youtube, v1.16.100 seems to be the most "stable."
I've created an addon that just adds a simple custom item, but I can't seem to get it to work.

I have been testing these in v1.16.221 of Minecraft Bedrock.
(My cousin and I play sometimes and we both have the same version so that we can join each other)

So, the question is:
Am I able to play a v1.16.100 Addon in v1.16.221?

(I just want to know if the problem is being in the wrong version, before I waste time trying to fix it myself)

Edit:
When I set the sword file's format version to 1.16.221 it does show in commands and in the creative inventory

[Landosumm]

You should have heard the childish squeal of joy I just made.
I was reading through other discussions and saw one called Why do item textures not show in game?, and I found an answer that said to enable "Holiday Creator Features." I tried it, and it worked.

Before, the sword acted like a completely blank item, it did as much damage as a punch, and it could break blocks in Creative.
Now, it functions like a normal sword.