The beauty of GitHub is the community. Look for repositories with a high number of "Stars" and "Forks." Read the "Issues" tab to see if users are reporting success or if the tool is currently patched/broken.
To find the best tools, you have to search smarter than just "tiktok bot." Try these queries in the GitHub search bar:
Note: Always be wary of repositories that ask you to download pre-compiled .exe files. The safest route is to run the source code (Python or Node.js) yourself.
Note: TikTok updates its API every few weeks. Any specific repo name is likely dead by the time you read this, but the patterns remain.