Users do not control the font. A content moderator reviewing flagged usernames sees whatever font the moderation tool renders. If that tool uses a system sans-serif (Arial, Helvetica, San Francisco), Cyrillic homoglyphs are invisible. If it used Zapfino, every pair would look different. The font is an uncontrolled variable in every visual review process.
Code dump for 2.16
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看北方，冰情雪韵不落幕。黑龙江哈尔滨梦幻冰雪馆，恒温环境让冰雪之美永驻，冰雕长城气势恢宏，吸引游客频频驻足；
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ВсеКиноСериалыМузыкаКнигиИскусствоТеатр，详情可参考新收录的资料
On 7 August, Kate Fox received a phone call that upended her life. A medical examiner said that her husband, Joe Ceccanti – who had been missing for several hours – had jumped from a railway overpass and died. He was 48.