To track ranking in SEMrush, create a project for your domain under the Projects menu. Then use the SEO Checker under Keywords and Pages to manually add pages and keywords by copying page URLs and entering keywords to track rankings.
1. Tracking Ranking in SEMrush
Create a Project
Under the main menu, go to project and add your domain
SEO Checker
Under Keywords and Pages, click on Manual
Add Page & Keywords
Copy the URL of the page, and add all the keywords you want to rank for.