Option for letters size

Hello SwiftKey team, the bless we got in android os it's the ability to customize, precisely using custom font specially Arabic fonts, but unfortunately there's penalty of apps limit that bless due to the lack of talent or the devs too busy to heard us. The feature I've been asking for since 4 years ago it's a slider to resize the letters sometimes when install custom font it's look to small on SwiftKey while the same font look perfect on gboard please heard me this time Sincerely