Here's how to make a panorama:
-In the Minecraft launcher, make or edit an installation and set the resolution to something like 300x300 or any resolution where both the numbers are equal.
-When you load the game, set the FOV to 90.
-Set your render distance to as high as you want. If so, make sure the scene you take is fully loaded.
-Set the daylight cycle game rule to false.
-If you have a resource pack, shader, or mod that animates objects, don't let the blocks wave. Make everything stay still. Even the clouds! If you want a mob in there, make it stay still using /data merge entity WHATEVER MOB {NoAI:1b}
-You may have shaders on as long as nothing is moving. What would be really nice is that you use /tick freeze in recent versions. I definitely can't in 1.20.1
-Take a screenshot of each side using whatever key bind you have the screenshot button on. Make sure each side doesn't overlap or have gaps.

Recommended using these commands (They will keep you in the same location, but will make you look in a certain direction):

/tp @p ~ ~ ~ facing ~ ~ ~-1 (to look straight north) this photo must be called "panorama_0.png"

/tp @p ~ ~ ~ facing ~1 ~ ~ (to look straight east) this photo must be called "panorama_1.png"

/tp @p ~ ~ ~ facing ~ ~ ~1 (to look straight south) this photo must be called "panorama_2.png"

/tp @p ~ ~ ~ facing ~-1 ~ ~ (to look straight west) this photo must be called "panorama_3.png"

/tp @p ~ ~ ~ facing ~ ~2 ~ (to look straight up) this photo must be called "panorama_4.png"

/tp @p ~ ~ ~ facing ~ ~-2 ~ (to look straight down) this photo must be called "panorama_5.png"

-Make a folder within the resourcepacks folder and name it whatever you want.
-Add a png file called "pack.png" (the photo could be whatever you want) in the new resource pack folder so you can keep track of it even more.
-Copy a mcmeta file and paste it into the folder next to pack.png (or make a new mcmeta file) make sure it's called "pack.mcmeta"
-Open the pack.mcmeta file using whatever text editing tool you have like TextEdit or Notepad++ and in between the quotes the description, replace with whatever you want.
-Next to the pack.mcmeta and pack.png files, make a new folder in your resource pack called "assets"
-In the assets folder, make a folder named "minecraft"
-In the "minecraft" folder make a folder named "textures"
-In the textures folder, make a folder named "gui"
-In the gui folder, make a folder named "title"
-In the title folder, make a folder named "background"
-Copy and paste your screenshots into the background folder

Now your resource pack panorama should work!