Hi,
Photoshop .psb files grayed out in InDesign Open window. You cannot place PSB images using the "Place" command. However, you can drag and drop the file from the desktop into a InDesign picture box.

Photoshop version is 22.1.1
InDesign version 16.0.2
macOS Catalina v10.15.7

In fact, graying out of legitimate files happens on Catalina with other software. Excel sometimes cannot access to .xls or .xlsx files via the Open window.

Sometimes legitimate files appear grayed out when the Open window is first opened but may turn black after few seconds.