Top Gun: Maverick takes place decades after the original movie, but in the trailer (and the promotional poster), Maverick loses his old leather jacket. It may look like the original movie, but it is not.
As pointed out at Taiwan News and Toychan a note on Maverick's leather jacket has changed.
In the movie 1986, the note "Far East Cruise 63-4 USS Galveston" read and presented flags for the United States, the United Nations, Japan and Taiwan. According to Taiwan News the note refers to a real American naval guided missile cruiser deployed in the waters surrounding Taiwan and Japan.
For the sequel now reads the "Indian Ocean Cruise 85-86 United States Navy ”and no longer have the Japanese and Taiwanese flags. As noted on Military.com it is unclear what these new flags refer to. The surrounding patches do not seem to have changed.
China's Tencent Pictures collaborated with Paramount Pictures for Top Gun: Maverick, which led to speculation that this prompted the patch to change. However, as reported on Livedoor neither Tencent nor Paramount have yet commented.