Yes, there are. As of 2022, the following 3 investment options exist for fast-tracking your citizenship application under the program:

Time To ILR and Citizenship Investment Requirement
5 Years to ILR (6 years to citizenship)  £2 million
3 Years to ILR (4 years to citizenship) £5 million
2 Years to ILR (3 years to citizenship)  £10 million