Yes, you can use it as long as you get the admission notice. Trademark registration is divided into two steps. The first step is to accept the application, that is, to issue an acceptance notice. After you get the acceptance notice, you can use TM in the upper right corner or lower right corner of the applied trademark. If you get the certificate after acceptance, you can use R.

Yours is being applied, which means that you have got the admission notice and can use it TM.