Minecraft Portal Builds
Nether and End portal surrounds that make travel feel epic.
X-Builds has one portal build for Minecraft Java 1.21, the Floating Crystal Portal Shrine (8,030 blocks), 0 of them free, each with an exact block list and a picture for every step.
Build it step by step in the X-Builds app
Pictures for every step, progress saved, works offline. Free.