Interesting image here for disc. When I look at the .eu site with 7498 exoplanets now, 106 show some type of disc apparently using IR excess and imaging. There are 323 stars with discs shown here, https://www.circumstellardisks.org/index.php
I have trouble finding good data on *protoplanetary* discs shown to the public. Mass, dust mass, gas mass, size in au etc.