GG5: (1) 【映える】 〔光に照らされて〕 shine (brilliantly); be set aglow; glow. (2) 〔見栄えがする〕 look 「good [attractive, nice, fine]; show to advantage.
中辞典: (1) 光に照らされて輝く〉 shine; glow  (2) 〈見ばえがする〉 look attractive [better, 《文》 to advantage]

I've sat on this a while. I think the best approach is to cut this back to はえる and created a new ばえる/バエる entry; Note that the references show both senses for はえる. I've drafted an entry for ばえる/バエる, so I'll close this for now/

@@ -17,7 +16,0 @@
-<r_ele>
-<reb>ばえる</reb>
-</r_ele>
-<r_ele>
-<reb>バエる</reb>
-<re_nokanji/>
-</r_ele>
@@ -25 +17,0 @@
-<stagr>はえる</stagr>
@@ -34 +25,0 @@
-<s_inf>ばえる, バエる are colloquial</s_inf>

ばえる is from インスタ栄え, but はえる is not. 
koj: ④立派に見える。目立つ。「―・えない男」
daijs: (3)（栄える）りっぱに見える。目立つ。「―・えない役割」

https://japanknowledge.com/contents/daijisen/update.html
https://numan.tokyo/words/ea16o
https://www.weblio.jp/content/ばえる

sense 2 is a back-formation from インスタ映え, so ばえる should xref インスタ映え, not vice versa.

In addition, it appears that sense 2 is never written 栄える or read はえる. More restr may be necessary, or we can have a separate entry for sense 2

若者は略して「映える　バエル」っていうみたいです。
https://tsu61.com/instagram/

20+ hits on twitter past 24 hrs for バエる

heard on TV a while back (can't remember 
if it was rendered as 映える or バエる on 
the screen)

@@ -16,0 +17,7 @@
+<r_ele>
+<reb>ばえる</reb>
+</r_ele>
+<r_ele>
+<reb>バエる</reb>
+<re_nokanji/>
+</r_ele>
@@ -17,0 +25 @@
+<stagr>はえる</stagr>
@@ -25,0 +34 @@
+<s_inf>ばえる, バエる are colloquial</s_inf>