Yes you can. It is entirely up to you how much of your ISA allowance is invested in each of the different types of ISAs.
There are four different types of ISA: Cash, Stocks and Share, Lifetime, and Innovative Finance ISAs.
You are only permitted one Lifetime ISA if you qualify, the rest of your allowance you can split across as many combinations of ISA account as you like.
For example, you could split your allowance across two Cash ISAs, two Stocks and Shares ISAs and two Innovative Finance ISAs.
Good to know
Minimum and maximum investment amounts vary with each ISA provider so be sure to check before making any commitments.
Please remember that the maximum allowance is £20,000 in total, no matter which ISA or combination of ISAs you choose in the current tax year.