On the internet you’ll find opinions on everything in every possible configuration. Part of the research process means evaluating your information sources. What’s your source in this case?
Personally, I start with the Cosmetic Ingredient Review. Phenoxyethanol was first reviewed in 1990 and again briefly in 2011. You can also check out the European Scientific Commmittee’s opinion from 2016.
I know these are long documents and if you’re not from a science background it seems a lot easier to read someone’s article about ingredient safety. I like these sources because they give the conditions of the studies and they help show the history of phenoxyethanol’s use in cosmetics (not to mention they are free to access). You can also ask your supplier for safety data, they are biased of course but it’s in their best interest to demonstrate their material’s safety. I’m sure others on this forum have their own sources, and I’d recommend you make your own list of criteria for why you might accept/reject a source, it’ll help you in the future when you have other ingredient concerns.