Youth extension therapies will be cheaper for insurance companies than current hospice care. As such it will not cost more than the price of your current insurance premiums. However, while the intellectual property is still protected, there may be some hiccups but they seem unlikely.

Specifically manufacturing of medicine is cheap. The R&D is expensive. As such even if the company owning the IP kept prices artificially high. Facilities in Africa, China, India, etc would reverse engineer them and medical tourism would become even more common. This is a constant threat for COVID vaccine manufacturers today. It’s very likely the prices of youth extension are not much greater than the COVID vaccine (I.e. about $20 per dose)

Meanwhile, the population of countries with single payer health care (e.g. Canada, New Zealand, etc), will also reject intellectual property protections for a company halfway around the world. Life extension for the population is more valuable than a few potential tariffs.