I tested the performance of various graphics solutions and encountered this bug.
If you set the shadows type in the scene settings to Planar, then the Dynamic Shadow Settings group will disappear in the Directional Light component (probably in other light sources as well), in which the Shadows Enabled parameter is present, without enabling which - planar shadow is not displayed. Parameter value (true/false) is still taken into account, although it should not be.
Accordingly, to enable it, you need to set the shadow type to ShadowMap, go to the light source, enable Dynamic Shadows, and then return the shadow type to Planar again.
ShadowMap
Planar
