Not only is 6 weeks a very short time, but the summer holidays definitely slow house viewing down. We have recently sold after 27 years in the same house and found the whole experience a different ball game from our previous 4 sells.
Today buyers are much more wary of interest rates and the affordability of a house. It would seem that those looking for family houses are very fussy and want value for money, and who could blame them.
It costs more today to upgrade bathrooms, kitchens etc. than it did in the past when we did it. I don't know why! Maybe standards are higher!
It took us several months to sell a detached family house in a very desirable area. We had no negative feedback, but on reflection I think the higher the price of a house the longer it takes to sell. There are less buyers in that price bracket.
It will go, Autumn is a busy time, our sold twice in the Autumn. One fell through, but another buyer came within 24 hrs.
I would add get all you paperwork ready, guarantees for work done on the house etc.
Sorry to have been so long winded! Good luck!