How long have you deleted the text messages? It is crucial to whether you can recover them successfully or not.
If newly generated files cover the deleted messages, it will be hardly to recover.
You need to stop using the phone immediately after the deletion. Then, select a reliable tool to begin the recovery. In general, it is easy to recover the deleted text message on your own.
If you are not experienced in it, you can refer to this page: https://www.minitool.com/android-recovery/recover-deleted-messages-android.html