There might have been a blessing in a church, though. I couldn't help but wonder why Harry and Meghan were allowed a religious ceremony while, in case of some unfortunate event, Kate, William, and their three children were at risk.
Harry would have been first in line. But if Meghan were indeed a Catholic (she was educated in a Catholic school), she could never become the queen without publicly renouncing her Catholic faith. Harry would have had to renounce his and his children's place in the line of succession under the 1701 Act of Settlement, which ensured a Protestant line to the English Throne.
No Roman Catholic or anyone married to one can be in the line of succession. Even Prince Michael of Kent, who was 15th in line to the throne at the time of his marriage, had to renounce his place when he married Baroness Mary Christine Anna Agnes Hedwig Ida von Reibnitz. She publicly uses her husband's title and is referred to as Princess Michael of Kent.
Henry VII's schism from the Catholic Church, founding a new one, and declaring himself its head, alongside the continued Protestantism of British monarchs, with the exception of his daughter Mary I, is why the British royal family upholds the Church of England.
Megan had to be confirmed into the Church of England before her marriage. They did baptize their second baby in the Anglican Church, but it's likely because without the baptism, the baby couldn't be in the line of succession. For the first baby, they were still working royals at the time and had him baptized in the Church of England.
Megan's religious affiliations seem quite flexible. She started as a Catholic, converted to Judaism for her marriage to Trevor, and then converted to the Church of England to marry Harry. It seems religion is as changeable for her as her choice of underwear.
Harry was raised as a member of the Church of England, but his religious choices now appear to align with whatever his wife tells him they are. There were articles about the queen not attending Charles and Camilla's wedding because Camilla was a divorcee, and the queen couldn't publicly support this as the head of the Church. I didn't realize the queen missed her son's wedding due to her stance on divorce.
It appears that Megan might have put the queen in a difficult position, akin to making your grandmother attend a divorce wedding she can't endorse. This also sheds light on the famous photo of the queen gazing at the newlywed Megan during the wedding ceremony.
