I'm not sure there's any way to answer this in-depth - while women could inherit the crown of England/Great Britain/the United Kingdom, historically women did and do not inherit titles in the peerage unless there was specific language attached to the title to allow it to be held by women in their own right. Prince Edward was given the title of Duke of Kent by his father in 1799, long before he fathered Victoria or was even married - the assumption at the time would have been that he'd get married soon and have multiple children, including at least one son to inherit the title. Because he had no sons, the title went extinct on his death. George IV could likely have granted her the title if he'd wished, but he was totally unwilling to grant her a significant name, let alone a title signaling that she was in line for the throne.

The title Duke of Kent and Strathearn was created with a remainder to "the 1st Duke's heirs male of the body lawfully begotten"

Which means that it must always be held by a legitimate son, grandson, great grandson etc etc of Prince Edward.

Since he had no legitimate sons, the title became extinct upon his death.

If it is clear that there will be no heirs male, there was sometimes a special remainder - such as the Earl Mountbatten of Burma. An old general, he only had two daughters - so that title was specially created with a remainder to "the 1st Earl's heirs male of the body lawfully begotten AND the 1st Earl's daughters and heirs male of their bodies lawfully begottend"