There are at least 3 main enemies here - UV degradation of the transparent cover, sealing against water ingress and damage due to thermal expansion/contraction cycles including seal failure, delamination and mechanical breakage of cells or interconnections. The panels you linked use PET which are better than the cheapest epoxy panels but I doubt that you'd get any manufacturer to guarantee them for much more than two years (they may well last much longer in practice for many users of course). ETFE is better, but more expensive than PET; glass is the best.
It's not easy to find independant studies on the lifetimes of the various materials but module manufacturers and distributers put out marketing statements which may provide some guidance. The numbers vary wildly though with some claiming 25 year lifetimes for ETFE and others say 5 years. Similarly for PET (2 to 5 years).
The actual operating conditions are going to have a big impact - a panel facing north in a location with lots of cloud cover (eg. northern europe) is going to be exposed to very much lower UV than one facing the sun in sunny climes. The temperature and water exposure conditions are going to be very different as well and thus it is very difficult for a manufacturer to specify how long a panel will last.
I think you will need to look for panels with ETFE or glass topcovers but that isn't sufficient to ensure a long lifetime. It's a difficult problem which will probably boil down to finding a manufacturer you trust - which is unlikely to be a cheap, random sellor on Aliexpress. Good luck and please let us know what you find.
Here is one manufacturer's opinion:
https://www.voltaicsystems.com/custom-solar-panels#faq_7What are the coating options?
All solar cells are protected with some sort of coating material. For commercial solar panels, it is often glass. For smaller panels there are a number of different options.
Urethane: Highly UV resistant, but heavier than ETFE. Our standard panels have a urethane coating and last up to 10 years in the sun with minimal power degradation. The urethane coating is poured or "potted" on the solar cells and leads to a highly waterproof panel. Each individual cell is completely encapsulated by the urethane.
ETFE: Slightly less UV resistance than urethane, but lighter weight. ETFE and EVA are attached to the cells via a lamination process. With high quality materials (there is a difference in the production quality of ETFE and EVA), these panels have an expected life of 5 years outside.
Epoxy or PET: Panels made with these coatings will be inexpensive, but we don't recommend this coating as it tends to have a relatively short lifetime. They are the least UV resistant of any of the options.
Glass: Most UV resistant, but also the heaviest and can be challenging to mount in a streamlined manner.
More marketing 'information':
https://qookka.com/en/blog/etfe-and-pet-two-key-materials-in-the-field-of-semi-flexible-panels-n3 Here is another report about a 3M topcover material:
https://www.osti.gov/servlets/purl/1166732 Although not particularly relevant to your problem, it would be interesting to know peoples experience with garden solar lights which are usually either epoxy encapsulated crystalline cells or amorphous glass panels. The former tend to crack or go cloudy with time and the latter suffer water damage - but I bet some people will have panels that worked fine for 5+ years whilst others have had numerous failures after only a year or so.