Have a look at this book https://uk.sagepub.com/en-gb/eur/successful-qualitative-research/book233059. It's a good starting point for qualitative research.
Appropriate article attached by Kirubel Manyazewal Mussie. Please take note of how the results are communicated as "set of concepts related to each other; to form a substantative theory". Those are the key guiding words.
Nicolò Zarotti The book you recommended is for Thematic Analysis not Grounded Theory, and these are two very different approaches to qualitative research.
Beyond that, I think the best way to study the reporting of GT is to read articles that used that method. One way to locate such articles is to use Google Scholar with a search that contains both the phrase "grounded theory" and key words related to your own research topic.
The guidance as per the following publications may further help:
Backman, K. and Kyngäs, H. A. (1999) Challenges of the grounded theory approach to a novice researcher, Nursing and Health Sciences, 1, 3, pp. 147-153. (See: The presentation of the results and their reliability, pp. 151-152).
Bitsch, V. (2005) Qualitative Research: A Grounded Theory Example and Evaluation Criteria, Journal of Agribusiness, 23, 1, pp. 75-91.
Charmaz, K. (1996) Grounded Theory, in Smith, J.A., Harré, S.R. and Van Langenhove, L. (eds.) Rethinking Methods in Psychology. London: Sage Publications, pp. 27-49.
Glaser, B. G. (2012) Stop. Write! Writing Grounded Theory, The Grounded Theory Review, 11, 1, pp. 2-11.
Glaser, B. G. (2020) Theoretical Writing, The Grounded Theory Review, 19, 2, pp. 8-19.
Sbaraini, A., Carter, S. M., Evans, R. W. and Blinkhorn, A. (2011) How to do a grounded theory study: a worked example of a study of dental practices, BMC medical research methodology, 11, 1, pp. 128-138.