H1B Extension timeline 汇报，另求问多久能收到receipt

Timeline:
2/28/2020 case received with pp
3/6/2020 rfe sent
4/9/2020 rfe response received
4/18/2020 case approved and emailed an approval notice
按照我的时间来看，在pp cutoff 之前的case 如果加了pp, 应该是没有影响到的。
现在我的律师说并没有收到approval notice, 请问大家这个email的notice也会被延迟嘛？一般纸质的notice 大概会多久收到呢。
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想问下楼主是哪个处理center呀？