Yes – I cannot imagine Denmark joining the union at expense of the mortgage credit. Besides the fact that the ECB has a general obligation to take different business models into account, I believe there is a real chance of obtaining further security in the form of an explicit statement in a potential Danish participation agreement.
The Ministry of Statistics and Programme Implementation was compelled to publish imputed figures for consumer price index (CPI) for two consecutive months during the first wave of the  Baldacci, Emanuele et al. ‘Innovation During the COVID-19 Crisis: Why It Was More Critical for Official Statistics Than Ever’. Statistical Journal of the IAOS, 1 Jan. 2022: 1 – 14. 3 United Nations (2020).