Non Unlabeled prevents unlabeled objects (like math.expression or figure) from being automatically numbered.

Example:

#import "@preview/non-unlabeled:0.2.0": *

// You need to do this to enable the package
#show math.equation: dont-number-unlabeled(math.equation) // For maths expressions
#show figure: dont-number-unlabeled(figure) // For numbers

// You also need to define how you number your objects (you can do this also without using headcount)
#import "@preview/headcount:0.1.0": *
#set math.equation(numbering: dependent-numbering("(1.1)", levels: 1))
#set heading(numbering: "1.")

= Suspicious additions

This equation is unimportant: it will not be numbered:
$
3 + 3 = 4
$

This one, on the other hand, will be used later:
$
3 + 3 = 7
$ <label>

Therefore it will be numbered. The following two equations instead won't.

$
3 + 3 = 42
$

$
3 + 3 = 24
$

This also needs to be numbered
$
3 + 3 = 777
$ <label2>

If you are working with something else than a math.expression or figure (like tables) it’s highly suggested to wrap it into a figure first. Otherwise, since the source code of this package is very small, you can also modify it directly, you just need to copy the same pattern used for math.expression and figure:

#let dont-number-unlabeled(object) = {
  it => {
    if object == math.equation{
      if it.block and not it.has("label") [
        #counter(object).update(v => v - 1)
        #object(
          it.body, 
          block: true, 
          numbering: none)#label("no_label")
      ] else {
        it
      }     
    } else if object == figure{
      if not it.has("label") [
        #counter(object).update(v => v - 1)
        #object(
          it.body, 
          caption:it.caption, 
          numbering: none,
          placement: it.placement,
          scope:it.scope,
          kind:it.kind,
          supplement:it.supplement,
          gap:it.gap,
          outlined:it.outlined
        )#label("no_label")
      ] else {
        it
      }
    // else if object == something-else-i-need ...
    } else [
      \=== Error ===
      
      unsupported object "#repr(object)"
    ]

  }
}

Send a pull request to my github repo if you believe that could be useful for other users too.