There are several places where DevS is discussed.
At DevotionalSex.com
Anyone who registers to this forum can post into this Public Discussion. But unfortunately very few decide to do this.
Once registered to this forum you can become a Forum Member. This gives access to about 2 decades of past discussions. The forum is fairly quiet now but there is the occasional post.
Reddit:
I've created a Devotional Sex group on Reddit. As I've set the age for 18+ you need to have joined Reddit and said that you are over 18 and want to see 18+ content. The posts I make her do get lots of views and this is where there is the most discussion. I don't always copy a Reddit post to this forum so it is worth checking out the Devotional Sex Reddit.
FetLife:
For those interested in the combination of DevS and kink I've created a Devotional Sex group on FetLife.