When using the flexible block rotation, the observer will place how i want it for a split second then it will revert back to how it would normally be placed, just found out doesn't work with droppers either, I don't know if its because i'm playing on a realm, but it works for hoppers, and the offset feature works.

It is because you are on a Realm. The block rotations for most blocks need a mod on the server to handle the requested custom facing. Some blocks work without it as well, such as Hoppers, Logs and Quartz Pillars, basically anything that only cares about the block side you click on.

However in 1.13+ it might be possible to make this work for any blocks without server-side support, but it will need a bunch of changes in Tweakeroo. I'll try to implement that as an option when I have the time to work on rewriting all the placement related code.

It is because you are on a Realm. The block rotations for most blocks need a mod on the server to handle the requested custom facing. Some blocks work without it as well, such as Hoppers, Logs and Quartz Pillars, basically anything that only cares about the block side you click on.

However in 1.13+ it might be possible to make this work for any blocks without server-side support, but it will need a bunch of changes in Tweakeroo. I'll try to implement that as an option when I have the time to work on rewriting all the placement related code.

Is there a data pack out there i could use? since you can't mod a realms.

No idea.

But like I said this may also become possible in some future versions of Tweakeroo with a "fallback option" you can enable in case the server doesn't have a mod supporting the rotations via the Carpet accurate placement protocol.