Changes in Font following 1805 Release
Font-family has changed to "72" as primary font-face from "Arial,Helvetica,sans-serif" after release 1805 '72' is going to be the primary font.
'72' is an award-winning official font which will give more flexibility to use different typefaces where previously limited with Arial and Helvetica.
For more details on the Font kindly reference (https://experience.sap.com/72)
UI-15001, Font Changes 1805, Font Changes, Post Release, Font Size, Size, 72 , KBA , LOD-SF-PLT-LAN , Issues with Translations (Language Issues) , LOD-SF-PLT , Foundational Capabilities & Tools , How To