QF postponed the A350 order indefinitely back in May.
https://www.forbes.com/sites/willhor...o-coronavirus/
Whilst the A350 may be the preferred type, B777s will be readily available for lease, or purchase secondhand at whatever age and mileage the company wants. The endorsement is similar to the B787 and the type is widely used with a proven history.
If finances are tight, the B777 could replace the A380 fairly easily, possibly on a temporary basis until conditions improve enough to make the A350 a solid business case.
Saving money and restructuring are the main concerns over the next few years. Grandiose prestige projects with expensive new aircraft take a back seat for a while.