If I share a Minecraft seed with a friend, will this affect my world(as in 1.17 features)

I have a nice seed that I want to share with a friend. However, I would like to wait to explore a vast amount of the world until 1.17 comes out fully (I'm on Bedrock Edition, by the way). If my friend explores a lot of chunks, will those be preset on my world, e.g. if my friend explores eight chunks in his world before the update, and I don't, will those chunks not generate 1.17 features in my world, per se, copper? Thanks a lot!

No, your friend playing with the same seed will not affect future chunks on your world.

Your friends playing on a seed will not effect your game. Seeds just create the world. If you play on the seed, it does not change it.