It seems like your Surface Pro 11 is indicating a potential battery issue due to the full charge capacity being at 88% of the design capacity after 119 cycle counts. This reduction in capacity can be considered normal wear and tear for lithium-ion batteries, which typically degrade over time and usage.
The cycle count you've mentioned (119) is within a reasonable range, as most lithium-ion batteries are rated for approximately 300 to 500 full charge cycles before significant capacity loss is expected. However, the actual lifespan can vary based on usage patterns and charging habits.
Charging your device to an 80% limit is indeed a good practice to prolong battery life, as it helps reduce stress on the battery compared to charging it to 100%.
If the Surface app continues to flag a potential battery issue, it may be worth running diagnostics using the Surface Diagnostic Toolkit (SDT) to check for any underlying problems. If the battery authentication fails or if you notice significant performance issues, consider reaching out to Microsoft Support for further assistance.
References: