So I've found a way how we can add custom Pottery Sherds, without having to completely override vanilla files, and also, this Add-On is compatible with any other Add-On which contains their own Pottery Sherds!

There are 34 new Pottery Sherds:

Apple Pottery Sherd
Armor Pottery Sherd
Blaze Pottery Sherd
Builder Pottery Sherd
Crystal Pottery Sherd
Deadbush Pottery Sherd
Mystery Pottery Sherd
Night Pottery Sherd
Otherside Pottery Sherd
Pig Pottery Sherd
Planter Pottery Sherd
Push Pottery Sherd
Record Pottery Sherd
Rose Pottery Sherd
Shroom Pottery Sherd
Shulker Pottery Sherd
Soul Pottery Sherd
Stranger Pottery Sherd
Time Pottery Sherd
Trident Pottery Sherd
Wave Pottery Sherd
Wither Pottery Sherd

v1.0.1 New Sherds (Proposed by MUNCHKING in Discord Server)

Bountiful Pottery Sherd
Coaster Pottery Sherd
Deapth Pottery Sherd
Frozen Pottery Sherd
Ghoul Pottery Sherd
Glide Pottery Sherd
Globe Pottery Sherd
Pillage Pottery Sherd
Salamander Pottery Sherd
Scam Pottery Sherd
Spy Pottery Sherd

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Where can I find each Pottery Sherd?

Rose, Pig, and Shroom Pottery Sherds are found in Plains Village House Chests
Crystal, Push, Record, Coaster, and Salamander Pottery Sherds are found in Abandoned Minecraft Minecart with Chest
Mystery, Globe and Spy Pottery Sherds are found in Ancient City
Shulker, Stranger and Glide Pottery Sherds are found in End City Chests
Otherside Pottery Sherd is found in Ruined Portal Chests
Trident and Deapth Pottery Sherds are found in Cold Ocean Ruins Suspicious Blocks
Wave Pottery Sherd is found in Warm Ocean Ruins Suspicious Blocks
Deadbush and Time Pottery Sherds are found in Desert Well Suspicious Blocks
Soul and Wither Pottery Sherds are obtained by Bartering with Piglins
Blaze and Ghoul Pottery Sherds are found in Nether Fortres
Apple, Armor, Builder, Digger, Planter, Night and Bountiful Pottery Sherds are found in Trail Ruins Suspicious Blocks
Frozen Pottery Sherd is found in Ice Plains Village House Chests
Pillage and Scam Pottery Sherds are found in Pillager Outposts

Also, this Add-On is translated to all 29 available languages in Minecraft Bedrock

If you have any ideas for new Patterns, let me know in the comments, as I will be updating the Add-On if I'll have more ideas for more Sherds! Enjoy! =D

Note: This Add-On doesn't require ANY experimantal toggles!

Pottery Paradise v1.0.1