ESim troubles on iPhone 11 to SE 2

Hey all.

I have an oddly specific question. I have an iPhone 11 as my main phone and an iPhone SE 2nd generation as a secondary phone. I recently converted my RedPocket to esim (early February) and I had been able to swap my RedPocket esim to the se and vice versa just fine in under 3 minutes. Recently, it’s began failing to swap it. I updated all my Apple devices to iOS 16.3.1 recently. It does the normal send a notification to swap to my 11, but then after sitting on the “activating” screen for 3-5 minutes it either gets stuck (freezes) or tells me to wait for it to activate. In this time my iPhone 11 still has 3-4 bars of Cell signal from RedPocket. I’ve let it sit for about an hour and it never activates or swaps the esim profile from the 11 to se. I’ve had to contact RedPocket one of the few times it’s failed because the ESIM data got stuck somewhere and wasn’t on either phone.

I don’t think this is related, but I do have a physical SIM card in my phone at the time of switching which is an international UK number from O2UK (shows up as T-Mobile due to roaming). Should it be removed before swapping? (and then put in the se when the transfer is complete?)

Thank you to anyone that can help me solve this.

Jakob