Reading across in Linked-IN, we all know what the root cause of this was.
I am no expert, but flow-assisted fishing of the nature that your colleague (and his management) are talking about is not always a the best approach and/or needs to be carefully risk-assessed.
As Gordon says, there are plenty people out there (many sitting at home) who could help develop and/or review detailed
plans in order to give your colleague (and his company) a positive outcome.
In fact, rp-squared are happy to help broker that activity if you like. Gordon is one of our registered associates: https://rp-squared.com/gordon-duncan-2/
We have seen perforating guns successfully fished with HWO unit after they were sanded in (?) whilst flowing the well during perforating, and helped with the Programme Review / Risk Assessment.
We now offer this as a remote (online) service, using 'Beyond Video-Conferencing' - see attached.
I hope that helps