There are a couple things to look at in this circumstance. First check the model number of the sensors.
2GIG sensors that are compatible with a 345Mhz version of the IQ Panel are the standard models.
Examples are DW10, DW20R, PIR1-345.
Vivint used those with the 2GIG GC2 panels. Subsequent panels used proprietary models which could not be reused.
Examples of proprietary models are DW11, DW21R, PIR2-345
In addition, you would need a 345Mhz version of the IQ Panel. Looking at your active subscription it is linked to a 319.5Mhz IQ Panel. That panel wouldn’t be compatible with 2GIG sensors.
It would be compatible with Z-wave devices. Old Z-wave devices would still need the clear device operation to be run first to clear any old network data saved within each device. Steps to do this are in the link below, follow the remove device steps first for each Z-wave device.