Hi Josef
Currently, MATLAB does not support continuous wavelet transform using 'Daubechies' wavelets. "cwt" function currently only suuports Morse, Morlet and bump wavelets. For more details you can refer here: https://www.mathworks.com/help/wavelet/ref/cwt.html?s_tid=doc_ta#bvaytl3-wname:~:text=morse%22%2C%20%22amor%22%2C%20and%20%22bump
To use Daubechies wavelets, you can use the "dwt" function which calculates the discrete wavelet transform. This functions supports a wide-range of wavelets. For more details you can refer to this documentation link: https://www.mathworks.com/help/wavelet/ref/dwt.html#d126e31834
I hope this helps.
Regards