Will I be able to put my iPad Pro in the case and close it if my iPad has a tempered screen protector?
This should not be a problem for the Slim Combo.
The gap between the keyboard and iPad Pro screen is approximately 3mm — this is enough to fit most screen protectors.
 
I use a charging stand that is also Smart Connector-based. Does the case cover the Smart Connector pins?
The Slim Combo case has been designed to keep the Smart Connectors accessible, so you can use it with a Smart Connector charging stand such as the Logitech Base.
 
Is the Slim Combo case keyboard compatible with Apple Silicon case?
The Slim Combo provides both iPad Protection + Stand and typing features. Because the Apple Silicon case doesn’t provide a stand function, which is needed to set up your iPad Pro at an angle for typing mode, it won’t work with the keyboard. For more information, see Viewing positions for the Logitech Slim Combo.