I'm brand new here so apologies if this is wrong. I'm using Liftoff & was able to search for & find your post like this:

• From any post tap ⋮ menu (top right in Liftoff).
• Select Open in browser (I have Liftoff set to use its in app browser)
• ≡ menu (top right in Liftoff)
• Tap search
• Select Search = Posts, Instances =All, Sort type = New
• You can leave community as the default All or
  • Tap community & type ask
  • Wait for the instances to populate, then select lemmy.ml/asklemmy
  • ignore that it then reverts the instance back to All
• Creator = All
• Search = type search query here. I used the term "search commumity" then tap Search
• Your post showed up as the top result

Edit: An easier way to do it

• Tap search icon at the bottom of Liftoff
• For me the instance shows as lemmy.world & there's no option to change this
• Type your search query in the search bar eg "search community"
• Your post shows near the top in results

You'll want to ask this in Liftoff support.