If you have UFC Fight Pass, you are eligible to watch UFC 252 Preliminary Fights. To open the access to the main event, you will need to buy the PPV from the UFC.tv. All you need to do is just hitting the order button in the UFC.tv. Choose the UFC 252 PPV package. Keep in mind that you could also choose to watch the bout a month later when it is added to your Fight Pass library.
If you do not have an ESPN+ subscription, there is the option of a bundle that gives one year of sporting fun, which needs you to pay some amount. You have the option of getting a whole pack, or you have the option of having separate bundles. However, paying for a full kit is a lot more cheaply than having to get them separately. Getting a kit is what most people go for if they do not have ESPN+. You can watch live UFC fights without having to go to the watch it physically.
UFC recently signed a contract with ESPN that allowed their sporting activities, including fights, to be streamed on ESPN+. Fans of UFC and PPV are loyal to fights that usually happen on Saturday nights, but for them to watch the matches on ESPN+, they need to have a subscription. Having a subscription to ESPN+ gives you not only access to UFC fights but also a lot many other live sporting games as well as recorded ones. To get a subscription, you need to pay a fee for all UFC games, or you can pay for all sporting activities in one year.
UFC 252 is the upcoming PPV event. In this case, PPV is the only official way that you can take to watch UFC 252 without any problem. The preliminary fights will be available in UFC Fight Pass, FOX Sports, as well as ESPN. If you have subscribed to either of them, you will be able to watch the preliminary fights for free. However, you will need to purchase the PPV package through UFC.tv to attend the main event of the UFC 252. If you are a subscriber of the UFC.tv, you can watch the UFC 252 main event replay a month after the actual event happens.