@Faheem, I am onsite and we get up before the sun rises every day. 
So, and I know that this is unusual, but even if guests check out early, I am usually there soon after they’ve left. (Except in the instance of recent Russian guests who left at 3 am - that’s too early even for me!)
On the evening before checkout, I always send the guests message via the platform. This includes ‘thank you for staying with us’. ‘let me know if I can help your checkout go smoothly’. ‘have a great journey home’ and (significantly) ‘please make sure that you check the apartment for your belongings so that you don’t leave anything behind’.
This has worked well for me. I’ve never found anything valuable left behind (what a shame!)
Getting into the rental as soon as the guests have left is important to me. I check that they haven’t left any food or spills that can attract bugs. If guests haven’t taken out the trash I do so for the same reason. . I check the bedding and towels so that I can treat any stains. I swill out the shower and flush the loo and turn the AC to an acceptable level.
This quick check only takes a few minutes. But I realise that not everyone is onsite so they can’t do this.