What is the best way to encourage members to introduce themselves in the community?

I am the community manager at a D2C brand with a good customer base. We are setting up a customer community and have identified a few hundred active customers as our initial members of the community.

So far, we have invited about 200 of our early members. We invited them in batches of 15-20 members. The onboarding flow encourages new members to post their introduction. However, only 7 members have posted introduction. Others have read the instructions; and have interacted with the content by liking or sometimes replying. The engagement is very low.

I want to know, is this normal as our community is new and is there anything I could do to make our members introduce to the community?