How to share my Apple TV + through Family Sharing?

That's what I expected would happen, but my family members couldn't see or access my account. I finally called apple support and learned that I not only need to turn on Family Sharing but also turn on Purchase Sharing in order for them to use my Apple TV account. That had not occurred to me because in the Family Sharing panel of the system preferences, it clearly shows the Apple TV accounts available.

All the information in the Apple support documents that I could find is about setting up family sharing; nothing about how family shares can use it. There may be something about turning on Purchase Sharing, but I didn't see it anywhere. It would be really helpful to have that included in the setup instructions. If it is already in the setup instructions, I apologize—I certainly could have missed it—but I didn't see it in the apple support pages or in any other online articles about family sharing.

You say I can turn off purchase sharing, but when I had it turned off, my family was not able to use my apple TV+ subscription. So:

Person A (me) sets up family sharing for Person B.

What does Person B need to do to use my Apple TV subscription? When they attempted to do access it, they only had access to a one-week trial on their own; my subscription was not visible to them.

Person B is in the same country and definitely accepted the invitation and joined the Family group. I received an email from Apple telling me they did so. Before I turned on purchase sharing, they tried watching Apple TV+ and could only do so by signing up for the trial subscription. It was only after I called apple support and was told I needed to have purchase sharing turned on—and I turned it on—that they were able to use my subscription.

Was the apple support person wrong about purchase sharing? Am I doing something wrong? We will test it again with purchase sharing turned off, but so far your information (which sounds correct to me and is how I expected it should work) is in conflict with the support tech I spoke to.

The only nuance of that conversation that I was asking about is whether Purchase Sharing is needed for my Family shares to be able to use my Apple TV+ subscription.