[2] She was elected at the 2019 Shetland by-election, after the sitting Liberal Democrat MSP Tavish Scott stepped down.

She made her maiden speech in the Scottish Parliament on 10 September 2019, which concerned immigration into Scotland after Brexit.

[8] From February 2020, Wishart also sat on the Scottish Parliament's Culture, Tourism, Europe and External Affairs Committee, taking over from Mike Rumbles.

Wishart cited as "encouraging" statements made by Hugh Pennington, emeritus professor at the University of Aberdeen, who had noted that "there could soon be a case for a geographical lifting of restrictions – such as in some of the Scottish islands and the Highlands and Grampian".

Other CPGs on which she is either Deputy or Co-Convener are Crofting, Fisheries and Coastal Communities, Islands, Men’s Violence Against Women and Children, Oil and Gas,  Poverty, Space, and Women Against State Pension Inequality (WASPI).