Thanks for posting on PSC.
Before attempting for LSA certification, you have to give "Lead System Architect Readiness Exam".
This certification exam is for Pega Certified Senior System Architects (CSSAs) with a minimum of 12 months field experience who are ready to extend their knowledge to become part of an elite team of the most sought-after resources for Pega projects.
The LSA Readiness exam is the first exam in the CLSA 7.3 certification path and focuses on configuration of Pega applications.
CSA certification (any version)
CSSA certification (any version)
CPDC certification (any version - option 1)
CSPMC certification (any version - option 2)
PEGA 7 READY BADGE:
Customer Service Ready Badge
SSA advanced topic: Customizing Security Requirements
SSA advanced topic: Configuring Agent Processing
SSA advanced topic: Customizing the User Experience
SSA advanced topic: Improving Application Performance
SSA advanced topic: Creating Mobile Solutions
REFER LINK for detailed module wise marks distribution and course content alongwith other details you've sought.
Hope it answers your questions, kindly notify if it does by marking this post as answered.