The RDSA & RDSB ex-divi date was 12/11 (https://www.shell.com/investors/dividend-information/interim-dividend-timetable.html) so as long as you owned the shares by close-of-day (16.30 GMT) on 11/11 you’ll get the dividend. T212 seemingly takes <10 days to pay dividends into user accounts after the announced payment date, presumably it takes a few days to reconcile transactions (including fractional shares), etc. Hang in there and it will come!