However, a spokesperson said Mr Colbeck, the minister in charge of sports and aged care, which has been a key issue in recent times, had in fact been on the campaign trail.

"In his capacity as Minister for Senior Australians and Aged Care Services, he has been visiting numerous aged care facilities across the country to outline... the Morrison Government's comprehensive reforms for the aged care sector," the spokesperson said.

"This included an in-person visit to Family Based Care in Burnie.

"Additionally, in his capacity as Minister for Sport, Minister Colbeck has participated in several national press conferences, including the launch of the Organising Committee for the Olympic Games.

"Throughout, he has continued to meet with constituents at his Devonport office and has participated in Senate team tours across Tasmania."

Mr Colbeck was listed on the official media release for a funding announcement in Devonport on Sunday, but he did not attend and Braddon MP Gavin Pearce said he was "an apology".

Also speaking in Devonport on Sunday, Labor Senator Penny Wong said Senator Colbeck had gone missing.

"I think Richard personifies Scott Morrison's 'it's not my job' [approach]," she said.

"I asked him many questions through the pandemic...and he never took responsibility and there are a lot of people who paid the price."