modded blocks xray

is there any way to add modded blocks to the xray blocks list?

Sure, here is how to do it:

First, press the "Edit" button on X-Ray's "Blocks" setting to open the block list editor.
Then type in the block's identifier (e.g. techreborn:tin_ore) and press enter (or click the "Add" button).

If you prefer to use chat commands instead, the syntax is: .xray add your_block_here

For example: .xray add techreborn:tin_ore

If X-Ray was on while you were editing the block list, you will need to turn it off and on again before you can see the changes (just press X twice).

Hope this helps!