ReelGeek
Free vertical video maker for Windows - photos in, a reel out
Hook text on the opening seconds and an end card if you want them.
The output is a 1080 by 1920 H.264 MP4 with no watermark and no export limit, and the same file works as is for TikTok, Instagram Reels and YouTube Shorts.
It never uploads your photographs and it never posts on your behalf. Every frame is rendered on your own PC.