Talk response activities and sleep probl

My child used to give response and do activities until she was 10 months she used to say few words etc but after that she stopped all and now she is 2 years 3 months still she wont talk, give proper response and do activities like kids of her age... and now even for sleep she wont sleep even if she feels sleepy she keeps her eyes open until its not possible to open her eyes and if she gets up in between she wil be active for 3 to 4 hours... before she used to sleep well now even that has become difficult but she sleeps atleast 10 hours per day which is sufficient but cant maintain her sleep routine... that has made us restless so can you please suggest what can be done as due to this pandemic we dont take her out.