Hi Cassie - very sorry to hear your news. I had chemo followed in May this year by a mastectomy and immediate recon with implant, then radiotherapy. My implant is "pre-pectoral", meaning it sits on top of the muscle and is supported in a sort of mesh thing (think ADM is the name). I was told there is less risk of the radio causing issues than if the implant goes under the muscle. Happy to answer any more questions you may have. All the very best to you for your treatment and decision making.
My surgeon said you really shouldn't have implant recon before radio. I had DIEP (tummy flap) recon followed by radio. There is still some risk of damage but much less - mine seems fine at the moment. It got a bit "sunburned" by the radio but recovered in a few weeks. I didn't want to go through more major surgery in a year's time so opted for immediate recon. But if you prefer implant recon i think you'll have to wait. Best wishes.