Outside the forum, I have been asked about WhatsApp and Telegram groups where sports betting codes are shared, I always tell anyone who ask to please share to me if they should find these such groups and websites because I will like to be a member.
I have come across many of such groups on Telegram and WhatsApp, but the thing is: Most of their games are not always accurate, as they always predicts that it is. Most of them even don't run a free predictionsgroup. All they do is run some free games, which can be correct either by luck or by coincidence, and they parade most of these their games on their channels and want people to join their paid group so that they get access to more games.
I don't always believe in such precautionsgroups, at least not 100%. There are more fake groups out there than the real ones, so you can either relay on your own predictions and then use those channels alone to crosscheck yours, if they give you any, and then you can make some shuffling in your games, but putting your 100% hope on them is not advisable.