Glad you found us here. Have you tried nipple suction devices?
2 Pieces Corrector for Inverted, Flat Twist Nipple Corrector, https://www.amazon.com/dp/B08NPG87LY/ref=cm_sw_r_cp_api_i_Z2YFH1EY2FPJ84A5XQXJ?_encoding=UTF8&psc=1