import time
from tqdm import tqdm

for i in tqdm(range(50), desc='debug'):
    time.sleep(0.1)

Then in terminal I see nothing until the loop has finished, and it just prints:

debug: 100% 50/50 [00:05<00:00, 9.81it/s]

My docker compose file has tty: true and os.isatty(sys.stdout.fileno()) returns true