If you're tackling a DIY mini split install, look for models with pre-charged...

https://wiki-dale.win/index.php/Do_Quick_Connect_Mini_Split_Fittings_Leak_if_I_Hand_Tighten_Them%3F

If you're tackling a DIY mini split install, look for models with pre-charged quick-connect linesets that save you from handling refrigerant or using a vacuum pump