No, you do not have to check tyre air pressure more frequently than a tube type tyre provided tubeless tyre is fitted properly on a correct rim with proper valve fitment. However, if condition of rim is not good due to conditions such as bent, cracked, rusted etc or tyre/valve is not properly fitted, this can cause frequent air loss problem. Since air pressure is the most critical parameter in a tyre for its optimum performance, it is advisable to check your tyre on a regular basis irrespective of its tube-type/tubeless construction.