interestingly from the same context (currently running iOS 18.5, going to iOS 26 Public Beta 1) the SE 2 only sees the update as 8GB, literally half what my iPhone 16 was showing
first screenshot from the SE, second from the 16
https://morel.us-east.host.bsky.network/xrpc/com.atproto.sync.getBlob?did=did:plc:4hawmtgzjx3vclfyphbhfn7v&cid=bafkreibtdij7jxeoqihnnob54aoh6mzjxyyuebmcti5l6ypr6ltza34kqe
https://morel.us-east.host.bsky.network/xrpc/com.atproto.sync.getBlob?did=did:plc:4hawmtgzjx3vclfyphbhfn7v&cid=bafkreibbkrtg236d7vkv5mm7uqq4gonvlyxgksvzdhuc7bcrmyfbuorksa