Please Make wandering traders better

I have been playing Minecraft since 2019 and everything in Minecraft is really good... I just wish for wandering trader to trade some useful items and at a reasonable price

I have a 1 year old superflat hard-core world where every thing was only possible bcz of wandering traders but the problem is that it takes me a lot of time and hardwork to get emeralds for just 1 trade ... and they don't really have any useful items .. it would be really nice of the developers if they add trades like lava bucket, obsidian, Redstone, sand(or TNT), etc. As these might Unlock a lot of new opportunities for players like me who survive superfalt, 1 chunk, skyblock, etc.

And if possible then add these update to all versions (beta, bedrock, Java, pocket )