iphone texting to android

i have an iphone 11. My daughter has an android. We have been texting for years. Last Sunday morning we conversed successfully. In the afternoon I texted her twice and she did not get them. We have been trying since then to trace what may be the problem. My husband has iphone and her husband has android. We three can text with no problem. I can get her texts but she does not get my reply. Husband and I have compared settings of our iphones. Nothing has changed. We both tried deleting all texts, deleting contacts and setting up again and turning phones off completely for hours. She still cannot read my texts to her.. She can read from my husband's iphone but not mine. any suggestions???