Yes, it is a description of efforts to grow covid from clinical samples. Isolating a "new" virus can be difficult which is why PCR was initially used despite the many problems involved.
The list of cell types (vero E6, Veroccl-81 etc) are different types of tissue culture cells to determine which cell lines the covid grows best on. The other components are typical growth requirements. For example the antibiotics/antifungal are added to prevent bacterial/yeast overgrowth of the culture media. The only way to recognize the virus is growing is when breaks (=plaques = cytopathic effect) occur in the layer of tissue culture cells. They then took the material from the plaques and used standard procedures to extract the virus nucleic acid for further evaluation and sequencing. This anon believes the intent to establish an accurate (or confirm) the sequence (= viral "fingerprint.") Possibly they are using the technique to find & identify mutant strains of covid, as those are common in RNA viruses like this.