As it is clear GetOldTweets3 is a python library for accessing old tweets which is not easily feasible with libraries like Tweepy. But recently, there is an unsolved issue with it due to the new Twitter API: https://github.com/Mottl/GetOldTweets3/issues/98.
The question is what is GetOldTweets3 alternative library for retrieving tweets without time constraints? In my experience, Tweepy can not retrieve more than 200 tweets.
So far the only method of scraping tweets that still seems to work is snscrape's jsonl method. or this https://github.com/rsafa/get-latest-tweets/