I added a lot of Custom UI and placed it on the screen for a combat-like visual Nobel.
It's like the HP of the enemy, the HP of the main character.

Then, when you click on the Custom UI part, the following text messages are not printed.

Is there a solution to this?

If the UI is purely meant to be visual and not interactable, disable Raycast Target on the Image component and Blocks Raycasts on the Canvas Group component on the root object.

Be aware that printers and UI's are mostly comprised of Unity UI components, so there are plenty of tutorials on Youtube, etc. that will explain their concept better.