Yes, Sue, this unit can operate with the Wi-Fi turned off; however, to use the full capability of the washer and dryer combo, the Wi-Fi connection is necessary for the special features. You can check the special features of the unit by clicking the link below and seeing pages 59-61.
User manual:
https://downloadcenter.samsung.com/content/UM/202501/20250123162936341/OID74251_IB_T-PJT_WD8000D_7LCD_EN_250123_1.pdf
Have a great day,
-Ernest-