Tanaka San, broker do play with TP and SL. Millions of time I have experience this and shared the experience in the forum. Not a single broker is genuine, all scammers. When you are near to hit TP, they even hold your order with few points to hit TP and when you are even 10 pips away from SL, they push candle so fast, you never feel the scam and then boom, SL hit.
As soon as you registered with any broker, they assign account manager for your account and then he/ she has a rights to make settings on their back office for your account through their own designed software. They don't have to do manually all the time, they just do limitations from their side and that's it. This is insight information.
Hiding TP is not a issue because they will find out any how, they can monitor anything. Example Exness they don't let you run any third party EA on third party VPS. I am currently experiencing this. I had a chat with them and came to know that you have to take permission from their support center to run any third party EA on third party VPS. Well exness is already a worst broker.
IC also scam, they have slippage issue. You will cross your TP price but your order will stay active hahahahaha.
FBS play slight with candle, at least better than others.
Most of the brokers have now changed their demo deposit amount to be minimum 1000$ so you cannot do proper FT and get actual results which you are looking for smaller account.