Thank you for your inquiry.
Yes, the RT105x series is supported by Embedded Studio.
You can generate a generic Cortex-M Project and start debugging right away.
A CMSIS CPU support package will also be added to the package manager some time this month for even easier project setups.
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Keep in mind, this is not a support forum. Its main purpose is user to user interaction.
Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
Should you be entitled to support contact us per e-mail.
The following contact form can be used for this: segger.com/about-us/contact-us/