Unable to switch accounts after first login

Questions
1

Hi, I’m login to okta from my flutter app using the code:

await _appAuth.authorizeAndExchangeCode(
        AuthorizationTokenRequest(
            this.clientId, REDIRECT_URI,
            issuer: 'https://${this
                .domain}/oauth2/${this.oAuthString}',
            discoveryUrl: OKTA_DISCOVERY_URL,
            scopes: <String>['openid', 'profile', 'offline_access'],
            promptValues: ['login'],
            additionalParameters: map),
      );

If the cache is clear, I get a web page where I can set email and password.
But next time, I wish to replace the account but i get page with only password:

Screenshot_20211031-144511_Chrome
Screenshot_20211031-144511_Chrome720×1600 25.4 KB

Is there a “Replace account” option any where?