Buckle up for $1, page-99

nope, pretty normal as per ASX Regulator Guide 187 - Auditor rotation + Atomo's own corporate governance policies. All these documents for this are available online..just search for stuff....
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https://download.asic.gov.au/media/1241039/rg187.pdf
policy RG 187.4 The rotation requirements are:
(a) the ‘time-out rule’ in s324DA(1); and (b) the ‘5/7 rule’ in s324DA(2).
RG 187.5The time-out rule provides that an individual who has played a significant role in the audit of a particular listed company or listed registered scheme (audited body) for 5 successive financial years is not eligible to continue to play a significant role unless the individual has not played such a role for at least 2 successive financial years. The 5/7 rule provides that an individual may not play a significant role in the audit of a particular audited body for more than 5 out of 7 successive financial years
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https://atomodiagnostics.com/wp-content/uploads/2020/02/Atomo-Audit-and-Risk-Committee-Charter-Final.pdf