Does the indoor Gree flexx 36hp230v12ah have nitrogen prefilled or R410a pre filled. the manual says its r410a but tech says otherwise

The FLEXX indoor and outdoor units are pre-charged with R410A refrigerant. The amount of refrigerant included is noted on the products label. Typically, the indoor and outdoor unit is charged to handle a 25' line set. During installation, only the line set will need a vacuum. Additional refrigerant may be needed if the line set exceeds 25'.