Here are a list of missing common Chinese characters based on 2021/02/09 version of Silver font:
Simplified Chinese (based on 2 different version lists of 3500 most commonly used characters):
亏亿卫习乡丰厅历冈贝仓匀凤忆订户办劝书扑扒厉龙轧业帅叼甩饥兰汇宁讨议讯辽巩圾扫扬亚协页夹轨划迈贞师屿岁岂刚丢迁伟乒乓华伪众爷伞杂负庆刘问闯汤讲论农讽访孙阵阴妇妈观纤约纪驰违抚坛坝贡坟苍严劳杨丽歼坚盯吴县园旷吨邮呜岗帐财秃佣皂彻邻肠龟删岛饭饮亩库疗应闲闷灶灿沟忧穷灾证评词层迟际陆劲驱纯纱纳纲驳纵纸纹纺驴纽责规拢拣势垃拦拨柜构丧卧枣卖厕奋垄轰顷斩齿虏肾贤畅鸣罗帜岭凯贩钓秆侦侧侨贫肤胀饰饱饲庙剂废净闸郑炕泻泼审帘实诗诚衬话询详肃录陕驾艰组驶驻驼绍贯挎挠赵拴垫挣挤挖挪茧荡栋砖耍牵临览竖眨哑趴贵虾蚁蚂虽骂哗响罚贱贴钞钩俩贷顺俭剑狮贸饶饺疮疤亲闻阀阁养炼烂洁浇浊济浑浓恼举觉宪袄诵垦陡娇贺垒绑绒绕骄绘络骆绞艳顽盏捞盐捎莲桥础顾轿毙虑监晓晌晕罢贼贿钳铅牺积笔债倾倘舰舱爹颂胳脑皱饿桨资阅烦烛递涝涨烫宽宾诸读袜课谁调谅谈谊恳剧娱预绢绣验职聋袭辆睁眯悬崭铜银偿衔鸽脖脸馅凑惭惕惯窑谎祸婶颈绩绪骑维绸趋搁搂搅联棵辈辉赏蜓赔铸铺销锄锐筛储惩腊馋阔羡粪溉窜窝裤谣谦缎骗缘摄塌摆摇摊鹊榆赖龄睬嗓锡锣锦筹傻腾酱滤滥滨滩谨缝摔榨酿蜡蝇赚锹锻稳箩鲜馒谱骡趟聪樱飘瞒踢镇颜颠辩缴瞧辫赢骤鹰嚷仑讥邓夯卢叽尔冯吕吆伦凫妆汛讳讹讼诀驮驯纫玛韧抡坞拟芜苇杈轩卤吱呕呐呛囤岖囱狈鸠彤刨庐闰兑沥沦汹沧沪诅诈坠纬玫坷坯拄拧矾歧昙咙账贬贮侥侣刽觅肮狞庞疟泞怔衩诡屉叁绅驹绊绎贰玷垛茬荚荞荠荤荧荔栈栅柠砚盅哆哟钙钝钠钦钧钮毡氢胧狰峦飒闺闽籽娄烁洼诫诬诲逊陨骇埂捂挚捣聂荸莹莺桦桅桩贾砾唠蚜鸯唁唧赂赃钾氨秫赁耸舀颁胰脐脓鸵鸳馁斋涡涣涤涧悯窍诺诽谆骏琐掐掂掸掺萤萧酝酗厢硕匾颅眶啃蛀唬啰啤啥啸逻婴赊铛铝铡铣铭矫秸秽笤偎衅敛阎阐焊焕鸿涮惦惋谍谐裆谒谓谚颇绰综绽缀琼揽搀韩棱椭颊雳翘凿喳鹃赋赎赐锉锌氯牍腌猬惫痪溃溅谤缅缆缔缕骚搪榄碘碉频嗦跷跺蜕嗡锚锥锨锭锰颓筷腻鹏颖雏馍馏痹誊窥谬媳缚缤赘蔫蔼碟碴碱辕辖嘁嘀镀舔箫舆漩谭缨撵蕴磕憋嘹镊篓膘鲤鲫瘪瘫澜谴鹤憨缭噩橱磺辙踱螃篡篙篱鲸瘾瘸糙濒缰檩磷瞪蹋嚎赡臊鳄嚣鳍癞攒孽鳖蹭蹬癣鬓鳞躏蘸镶瓤瞅嘻兹镑鲍滇巅尴赣缉槛跤馈睐拎浏啪鲨潇绚丫尧贻荫辗瞩拽 (Total: 865)
Traditional Chinese (based on chart of 4808 commonly used characters):
丫乒乓乩仃伕仳佣俞倌倀倘偺偌偎傖傻傯僱儈儐兕兗划刨剁剎剜剷匾卹厝叼叵吆吒吱呸咚唁唧啪啃啕啤唬喳喲喱嗓嗦嗎嗡嘀嘍嘟嘈嘮嘻嘹嘰噙噩噥噱噯嚎嚐嚅嚨嚷囌囪囤圳圬圯圾垃坷埂埤塌塭墀壢壩夤妞妤姍妯姒姘姣娓娣娌婊婷媳媲嫘嫵嬝嬴嬤嬸孓孽孿屜崁崆巔帘幛弈弒彆彞彤彥徬怔怵惋惦悻惕愜慼懵戕戢扒拄抿抨拚拎挖拽拴捎捂挪捱掄掙摒搪搽摔摑撐擰攆擻攏攔攙旎旖昀晌暨桅棵榆榨榷榫榭樁槳櫥櫝歧毽氐氖氟氨氦氯氳汙洱涮湔溉滇溼漳漩漯漪灤灶炕烊焊燙燜燄燴爹牖牠牯犄犛猓猙獷玀玨玫玷琊琍璩璦甩甭甽疤痱瘓瘸癥癱皂盎盯眨眶睏睞睪睬睜睽瞇瞌瞟瞪瞧矓矽砝砷砭硃碘碉碟磕磷磺祆穌窠竽筷篙篛篡篾籮粵糙紉紼絀綑綁綞縑縈繅缽罄罈羋羿翱耍聱肫胰胭胳脖臏臬舀舔舢舨荔荸莒菸蒞蓓蘸蛀蚵蚱蜓蜇蜢螃螞蟑蟈蠔裊褚諉謊豉豔賅賒賬贛趟趴跎跺踫踢踱踹蹋蹬蹺躉躂軔轔迆遴邐鄱鄹酗醃醣醞鈣鈉鈸鈽鈾銻銼錳鍰鎊鎢鏜鏍鐲鑣閡閩闋闈闐陡韁韌颳颺颼飧飪餛饜饞騖骯鬃魷鯽鯧鰱鱔鱖鱷鵪鷥鹼麂鼙鼴齜 (Total: 401)
The lists can be referred on https://github.com/NightFurySL2001/cjktables under `china/standard/xiandai_changyong.txt` and `yiwu_jiaoyu.txt` for Simplified Chinese, and `taiwan/standard/edu_standard_1.txt` for Traditional Chinese.