Простое решение:
const date1 = new Date('2020-08-03T11:46:25+00:00');
let date = date1.getDate();
if (date < 10) date = '0' + date;
let month = date1.getMonth();
if (month < 10) month = '0' + month;
let year = date1.getFullYear();
let result = date + '.' + month + '.' + year;