I hear you, Mama. My daughter lives a day's drive away: not possible until covid restrictions lift. My son lives in another country, so ditto. Thank goodness for skype, zoom, texts, and emails; but no-- they're not the same.
My son and I have a good, solid relationship but he's not the best correspondent. Something to live with.
You are symbolized by the moon in your daughter's chart. It is the tip of a yod formation. A lot of her personal growth will come through her relationship with you-- which can happen from a distance.
It reminded me so much of the poem by e. e. cummings, "i carry your heart with me."
https://www.poetryfoundation.org/poetrymagazine/poems/49493/i-carry-your-heart-with-mei-carry-it-in
The 10th house traditionally is the house of one's mother. Saturn on the MC is not a warm fuzzy blanket kind of a planet but it makes a nice out-of-sign sextile to the moon. I don't think she sees you in a negative light. As a single mom, probably you had to be the parental disciplinarian and bread-winner.
Saturn is the traditional ruler of Aquarius, the sign on your daughter's 7th house of committed relationships. That, coupled with Uranus as the modern ruler of Aquarius and with Uranus in the 7th, looks like an unusual relationship (Uranus) with an older man (Saturn.)
Transiting Neptune has been hovering around your daughter's sun-Venus. This may be a creative time for her, but her sense of identity (sun) may not be something she can understand clearly at this time.
I think all we can do when birds leave the nest and fly far away is to hold the space of kindness and permanent unconditional love. Send her a message once a week or so. Let her know that you have put together a full and rewarding life as an independent woman.
I don't think that your daughter is terribly lonely, but it seems that you are. It's perfectly understandable.