How to update value in modal if I clicked button on parent page without dismiss the modal

My Modal

const modal = await this.modalCtrl.create({
      component: SelectSchedulePage,
      cssClass: 'modal-bottom-sheet',
      initialBreakpoint: 0.3,
      breakpoints: [0.3, 0.5],
      backdropDismiss: false,
      backdropBreakpoint: 0.3,
      handleBehavior: 'cycle',
      componentProps: {
        busEta: this.busEta
    }).then(modal => modal.present());;

SelectSchedulePage Component

import { Component, Input, OnInit } from '@angular/core';

  selector: 'app-select-schedule',
  templateUrl: './',
  styleUrls: ['./'],
export class SelectSchedulePage implements OnInit {
  @Input() busEta: any;

  onReminder: boolean = false;
  selectedSchedule: any;

  constructor() { }

  ngOnInit() { }

Assume i want to update busEta every time i clicked button on parent page, and display on modal content while modal still showed up without closing it