cubiomes-viewer VS SeedCracker

Try using cubiomes for this, tho with a 80k radius it will probably take forever to find a seed matching what you look for.

Cubiomes Viewer is a very user-friendly interface for the very powerful Cubiomes library. lets you set up conditions to search by, so if you only want, say, a seed with a quad village and a pillager tower at spawn (4684626985, my current survival world seed, has this), you can look for that. If you only want, say, a cluster of 23 ancient cities in one giant mountain range near spawn (686912673753764), you can look for that, too. If you want to spawn in a cherry blossom village surrounded by a ring of mountains (1277916622), you can do that too. The more specific your conditions get, the longer it'll take to search seeds - say you want to find a ton of different biomes across a huge area, it won't search too quickly. If you just want some particular structure or cluster of structures near spawn, it can do this quite fast (i've got a very old cpu and can search some 23 million seeds per second when i'm only looking for some structures or biomes in a small area)

I also used Cubiomes Viewer app to find it. You can click here to download it from github from latest release.

I recommend having a shot at the tool Cubiomes Viewer! We used it to find a good seed for our SMP recently and it works great. (While it may not be able to locate a structure for you because of the differences between Java and Bedrock in that regard, the biomes part should work well.) It's a little confusing to use at first, but here's the github and a user guide. Hope this helps!

Over the past few months, I have spent some of my spare time writing a Cubiomes Viewer User Guide to help people learn more about using the Java Seed Finding program that has helped so many of us become seedfinders for Minecraft. The guide is listed above, and you can find the download for the program here: Cubiomes-Viewer - Github

Well you might want to get them by yourself with cubiome

one of them is https://github.com/Cubitect/cubiomes-viewer/releases another one i know of it is https://sourceforge.net/projects/amidst.mirror/files/ ; there are many more these are just two examples

You should you use cubiomes: https://github.com/Cubitect/cubiomes-viewer/releases

If you don't respect this, you can use https://github.com/KaptainWutax/SeedCracker

Custom code, usually. KaptainWutax made a program a few years ago which can crack seeds just by scanning the world. When seed cracking, though, you are looking for certain features which can rule out many many seeds very easily. For example, finding specific dungeon coordinates and mossy cobble patterns can narrow it down dramatically. For this process, you need not scan that much since it's some simple maths applied to not that many blocks and not checking very many times.

Im not an expert but cords are needed or at least if you want to solve it in any time. you say you play on that SMP so maybe use seedcrackermod but KaptainWutax. It is a fabric mod that searches the world for structures like shipwrecks and once you find 5 of them it can crack the seed within minutes or even less (depends on your gpu)

Otherwise, I found a mod that will calculate a server's seed but you have to actually be on the server; most of the actual tools seem to be private, most likely due to security concerns as stated above.