JSFiddle - React, Tailwind, and code Playground
JavaScript
var vk_regexp = /\[([\w\d-\._]+)\|([^\]]+)\]/iu;
console.info('NEW TEST');
console.log(vk_regexp.exec('werwertwert [id111|test1]🌸✨'));
console.log(vk_regexp.exec('wergwert [id222|test2]'));
console.log(vk_regexp.exec('[id309702777|Алина] просто надо'));