@@ -22 +22 @@
-<gloss>display (e.g. of power, of wealth, etc.)</gloss>
+<gloss>display (of power, wealth, etc.)</gloss>

GG5, etc.

Usually verbal:
誇示	144258	  
誇示し	54118	  
誇示する	52697	 

All of the の ngrams
誇示の	2474	  
誇示のため	1007	  
誇示の為	174	  
誇示の手段	101	  
誇示のよう	71	  
誇示の象徴	58	<-- kind-of-sort-of, but "a symbol of ostentation"
誇示の場	50	  
誇示の意味	45	  

https://eow.alc.co.jp/search?q=誇示
誇示して
flauntingly
ostentatiously
誇示している
flaunting

他動
brandish（物を）
display（～を）
exhibit（作品などを公然と）〔【直訳】外へ(ex)差し出す(hibit)〕
flaunt（～を）〔【類】show off〕

～を誇示する
brag about
display ~ ostentatiously
make a big show of something
make a show of

In rough order of popularity
https://context.reverso.net/translation/japanese-english/誇示
flaunt/flaunting/flauned
show off/ showing off/ showed off
display 

Sometimes it's unnecessary to adorn "display":
"But the sacrifice of buffalo and the ritual display of wealth also exhibits the status of the deceased, and, by extension, the deceased's family."
"By going to Portugal he could champion the oppressed, display his chivalry and self-denial, uphold constitutional rule, and enjoy the freedom of action he craved."
"In a castle, a castle tower had been a manifestation of dominance over the territory and a display of power against other domains and threats, that is, a symbol of legitimacy."

Encountered in my anime.  One translator literally chose "flaunting" the other "showing off" ("their magic strength").  These are easily verified glosses.

You can add "ostentation" to my list of new English vocabulary...  My original inclination was to change this to "ostentatious display" (as in "an ostentatious display of wealth"). eijiro actually has "display ~ ostentatiously".  You might like some other terms on the list...  After looking over actual reverso glosses, though, I'm reluctantly inclined to give "display" as a direct gloss(3rd-most popular on reverso), but with an "e.g." that makes it clear why it can work alone.

I guess we could switch "display" for "displaying", but then it would be hard to squeeze "of" into the structure, and that seems like a nice hint... well, either way.

Does not appear to be [adj-no]. 

Was tempted to write out:
(ostentatious) display (e.g. of power, of wealth, etc.)

This seems perfectly correct, but I worry you'd find it too ugly.

@@ -20 +20,3 @@
-<pos>&adj-no;</pos>
+<gloss>flaunting</gloss>
+<gloss>showing off</gloss>
+<gloss>display (e.g. of power, of wealth, etc.)</gloss>
@@ -22 +23,0 @@
-<gloss>display</gloss>

Correct POS order
-*- via bulkupd.py -*-

@@ -18,0 +19 @@
+<pos>&vt;</pos>
@@ -20 +20,0 @@
-<pos>&vt;</pos>

Meikyo vt and vi additions to n,vs entries
-*- via bulkupd.py -*-

@@ -19,0 +20 @@
+<pos>&vt;</pos>