Less secure apps for sending Mail will no longer be supported

On your Mailer documentation (See Mailer - 5.x), you ask to configurate “Less secure apps” for send emails.

But GMail and Microsoft Exchange will disclose this option this year. See this message:

We need to implement a more secure Auth for access SMTP like XOAUTH2 or Certificates (for Microsoft Exchange). Currently, I installed PHPMailer with decomplexity’s SendOauth2 wrapper (Github) for continue send emails to my customers.

Could you integrate these libraries (PHPMailer), or add features in Mailer, in CakePHP Core before the timeout?