Go to Creative mode or use commands
Gather 12 End Portal Frames
Gather 12 Eyes of Ender
Stand inside a 3×3 empty area
Place 3 End Portal Frames on one side
Place 3 End Portal Frames on the opposite side
Place 3 End Portal Frames on the remaining two sides
Make sure the frames form a complete 12-frame square
Place each End Portal Frame facing inward toward the center
Insert 1 Eye of Ender into each frame
Fill all 12 frames with Eyes of Ender
Enter the activated End Portal
Use commands if needed: `/give @p minecraft:end_portal_frame` and `/give @p minecraft:ender_eye`