Roamless eSIM offers 4G/LTE and 5G connectivity in most destinations.
Please note that:
In certain destinations only 4G or 3G coverage is offered.
Even if 5G coverage is offered, its availability depends on the selected network's coverage in your current location, as well as other factors like traffic volume and network congestion.
Please see this article on how to identify supported networks that you can use with your Roamless eSIM and whether 4G and 5G is offered in any particular destination.