Lobbe has been sidelined for around 10 weeks due to a knee injury, while White has been out since tearing his pectoral in Round 1.
Both players are expected to return via the reserves this weekend.
Meanwhile, rookie Will Snelling is also a chance to return via the SANFL from a foot injury.
“We’re confident on ‘Lobbes’ and Will returning this week, but will test both of them as well as Matt White,” Port Adelaide high performance manager Darren Burgess told the club’s website.
The Power face North Melbourne at Etihad Stadium on Saturday afternoon.