Website visible on Google search only with the trailing slash

My website is only visible on Google when accessed with the trailing slash. How to fix this issue? Here are screen shots

https://ibb.co/tDZw0vL
https://ibb.co/rFkkmx5

Not really anything to fix. The first screenshot shows that Google has recognised you are searching for pages of a domain, as you have given a properly formatted url. The second screenshot Google thinks you are searching for a keyword phrase and so has automatically changed the search query is showing you results for that phrase.
Unless all your traffic comes from people searching for your url, it's not something you need to worry about.