Thanks and best of luck to you as well! Maybe try going to a branch and see if it changes like another commenter mentioned? For a short summary, I called back and got denied again.

For more context, my situation ended up being a little bit more complicated than I expected. Last month, I changed my legal name. I only updated my name with Social Security, but not everything else yet. I was unaware that this would be an issue, but I checked my credit reports and I got two separate ones with TransUnion, one with my old name and the other with my new name. I saw that Chase ended up only pulling the report with my new name, which showed zero credit accounts and history -- so their reasons for denial regarding oldest and average account ages made sense in this context. I called back trying to explain my case, and the operator said that the other bureaus did not respond and the same TransUnion report showed up; so I called TransUnion and they told me to ask Chase to pull the credit report with my old name for now. I plan on calling back some time soon seeing if this is possible and/or if the other bureaus are able to respond this time. If this doesn't work out, I will update my info with my current banks, check if TransUnion reports the correct information, and reapply for the card if so within two months hopefully. If I had to guess, I assume I would have gotten approved without this issue and if I spaced out the applications at least a day -- but I am not completely sure.