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

https://nova-wiki.win/index.php/Is_It_Cheaper_to_Hire_an_Electrician_and_DIY_the_Rest_of_the_Install%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