People are trying to help you.
Selling/buying with a tenant is very complicated and will put lots of people off. You need to recognise that.
Recently I bought a property with a tenant. When I viewed, they had been served notice of 2 months to vacate. That had been necessary to put property onto market. The tenant allowed viewings (they don t have to until last 2 months after notice served)
I was a cash buyer - no requirement for mortgage and nothing to sell and was looking for buy to let property. As agent knew this, they asked if I would be interested in keeping tenant. I was. The fact I was generated work for the solicitor and was only possible because I was not getting a mortgage. If a buyer had been getting a mortgage, the mortgage lenders would require vacant possession before sale.
Therefore, trying to sell with a tenant in place will limit you to genuine cash buyers and severely restrict your market. Genuine cash buyers who want to buy to let always drive hard bargains and you will usually get a lower price.
Therefore, just be aware if all these things. Most people give tenants notice. Most actually wait for them to move out before marketing - so much easier and more attractive to most buyers. A few give notice and then start viewings if the tenant agrees to it (most don't ) but make clear that the tenant will be gone by the time of sale. Solicitors and mortgage lenders will require evidence that vacant possession is now possible - ie tenant is gone before exchange.
So, I can see you'd like to keep earning rent whilst you market the property. However, the reality is that by not giving notice at least, you are creating a difficult selling position....and in the current market you really don't want to do that. You may well need to re-think.
It's helpful advice, not designed to upset you. If you want to sell and get a good price, you really should be willing to hear what people say or three no point goi g on a public forum.