Check for the availability of "accessory aids or exit assist bars" at major recumbent shops. It's akin to grab bars in a shower. Two companies that come to mind are Utah Trikes and Power On Cycling in TN. Both offer accessory aids that may fit your trike. Much cheaper than a trade in.
https://www.utahtrikes.com/UTCAT-820.html Mark Powers has been active in modifying trikes for disabled veterans.
https://www.poweroncycling.com/produ...t-bars-839.htm
I vowed to never respond to the original post as I refuse to be classified as "Elderly". Old, yes but elderly no. That conjures up the image of being really rickety.