Yes, I've seen that. But I know that while most of the time wills mention all children, that's not always the case, for one reason or another, liked married daughters may not be mentioned if they aren't receiving anything. I have an ancestor who was widowed while she had small children still to raise and she wrote her father and asked for her inheritance 'now' so she could support herself and her minor children. In cases like that scenario, such a child probably wouldn't be listed in a future will of the father who already gave her what she was going to get.
All that said, looking at the dates of the children, several of them were in their 50s when their father died and he may have only left inheritance to younger, unmarried daughters. I see that Rachel doesn't have a husband or children connected to her. and even though she's mentioned in the will, she's not listed among the list of children in her father's profile. So often the list of children are incomplete. But we know from the will that he did, in fact, have a daughter named Rachel. But my point being, it may be she never married and so her father provided for her rather than the married daughters. Just speculation, of course.
I'm not seeing a Maryann even connected as a daughter here on Geni. It's showing a daughter named Mary Elizabeth. Only three sons are mentioned as being in the will, but the list of children shows eight sons. So, there is a big difference in those he left inheritance to and the total number of his children. It probably depended at least in part on their individual situations.
