https://dictionary.cambridge.org/ru/%D1%81%D0%BB%D0%BE%D0%B2%D0%B0%D1%80%D1%8C/%D0%B0%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%B8%D0%B9/bite-the-bullet

Hey guys! How about military idioms. (bite the bullet or got your six)

"Got your six" does not make sense, except as a fragment, where the context says what specific "six" is involved. I cannot imagine saying this in any reasonable conversation. Again, "She had to bite the bullet to control us using Telegram" does not make sense. If someone has to bite the bullet it means they have to suffer in silence but if "she" is silent, she cannot prevent us using Telegram. I hope this helps.