I post to Instagram & facebook from an all wired desktop by using chrome developer tools –> mobile view here’s a good guide on how to do this: https://www.esocmedia.com/instagram-marketing/how-upload-photos-on-instagram-from-pc/?fbclid=IwAR2jyAwPDKYeWTh57ga6RJtWfBvnpValNw-3_a2CisVKCgLNuklcBeKoNCw