The SkyGuardTWX ships as a portable, with exception of the new EX model. They do have the means to bolt the unit into the plane and then use installed antennas. The new EX meets the 2020 compliancy for LSA and Experimental Aircraft when installed. Below is there Compliancy Statement.
2020 Compliancy Statement: “Meets Performance Requirements” of TSO-C154c for 1/1/2020 mandate when installed in Experimental and LSA aircraft when installed with external antennas with external antennas (per February 9, 2015 rule change to 14 CFR 91.225 (b)(1)(ii)
(Installation in LSA aircraft needs letter of authorization from aircraft manufacturer)
They are still working on the Certification for Type Certified aircraft. I'd reach out to Don at SkyGuardTWX with any certification questions. I hope this helps.