I had this same failure a few weeks ago after only owning for a month. Was a bit annoyed however I knew it was going to fail at some point just not in year 1! Possibly I helped it along with a very brisk drive on some undulating with big compression roads.
Lucky I saved the back box and got Lexus Cambridge to sort, while becoming a Gold Member for the 10% discount. Lexus did manage to fix and leave me with a rather annoying heat shield rattle as broke the mounting hole for the shield, was not impressed. So complained and drilled the rivet out and fitted a large washer and bolt to remedy, would of took them 10 mins prior to refitting the exhaust, they need to look at their sign off process before giving back to a customer.
Anyway the exhaust should last another 10 years and is nice a quiet as the CVT would never suit an aftermarket one with random revving.
https://www.amazon.co.uk/clouddrive/share/8SqZYBB1CO99gEnfaKdhirapVYOkduU94YWRRefJ0tA?v=grid&ref_=cd_ph_share_link_copy