How did Shri Sayandev's boon, which led to Shri Dasganu Maharaj writing his biographies, influence the content of Bhaktisaramrut?

The preface detailed in Chapter 0 does not establish a connection between Shri Sayandev's boon and Shri Dasganu Maharaj's work. According to the text, Shri Sayandev received a boon from Shri Narsimha Saraswati Maharaj that his descendants would perform constant service, and Shri Saraswati Gangadhar is mentioned as the fifth descendant in this lineage. In a separate section, Chapter 0 discusses Shri Dasganu Maharaj as an author worthy of Shri Sai Baba's grace who wrote biographies in Bhaktalilamrut and Bhaktisaramrut. The source does not state that Sayandev's boon had any influence on Shri Dasganu Maharaj or his writings.