Engage fans, don't get discouraged by CYL results. It takes time.
It took 3 CYLs for Fates, the then most popular game at the time, to get their first CYL rep, and to date they've only had TWO winners so far.
It took 5 CYLs for Marth, the literal face of the series and Mr. Fire Emblem himself, to win, and he ended up in 2nd spot anyway.
Chrom was stuck in the top 5 for like, 4 years in a row. Similar situation with Bernadetta, and she had the 3H numbers advantage too.
Meanwhile, Engage still has quite a number of characters in the top 20 males+females. And just like the Chrom-Robin/Tiki-Robin situation, once one Engage character wins, it'll be easier to push others to the top as well. It just takes time.
Not only that, Engage is guaranteed the strongest lineup in the game due to busted Emblem Heroes+rings.