Is there anything else that needs to be done after click "Solved"?

Support
3

I think that depends on your community. Do you want others to still be able to post in solved topics? Do you close topics after some time anyway?

I think the default of the solved topics auto close hours site setting is 0.

The image displays a setting related to automatically closing solved topics after a specified number of hours once the topic has been marked as solved, with an input field to set the number of hours or disable the auto-closing feature by setting it to 0. (Captioned by AI)
The image displays a setting related to automatically closing solved topics after a specified number of hours once the topic has been marked as solved, with an input field to set the number of hours or disable the auto-closing feature by setting it to 0. (Captioned by AI)1061×186 41.4 KB

Additionally there is a category setting to close solved topics
The image displays text explaining that a topic marked as "Solved" will automatically close a certain number of hours after the last reply, with a blank field likely intended to specify the number of hours. (Captioned by AI)
The image displays text explaining that a topic marked as "Solved" will automatically close a certain number of hours after the last reply, with a blank field likely intended to specify the number of hours. (Captioned by AI)940×240 31 KB