Unless your hoster has a special policy to slow access from mobiles, I think it's all about the coding of your site.
https://www.google.com/search?q=website+optimize+mobile+speed might help.
Hey, I have a leaf blowers related website, https://leaf-blower.net
I am using NameCheap hosting but when I check my website speed in google developers site speed checker. the speed shows 90% on desktop but on mobile devices, it is 70% only. A big number of my website visitors is from mobile devices. what should I do now? how I can increase speed? is it possible by changing hosting? If yes. Kindly recommend a good hosting